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Week 17: CSS Grid Interactive Demo

A Pen By Josh Reynolds

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HTML

            
              <div class="demo-wrapper">  
  <div class="grid-controls">
    
    <section class="grid-controls__header">
      <h3>Grid Container Controls</h3>
      <button class="btn toggle-view">Switch Controls</button>
      <button class="btn toggle-controls">Toggle View</button>
      <button class="btn clear-fields">Clear Fields</button>
    </section>
    
    <section class="controls--wrapper">
        
      <div class="grid-controls--container">

        <!--   GRID TEMPLATE COLUMNS   -->
        <section class="grid-controls__body">
      
        <div class="control--multiple-fields multiple-cols">
          <p>Set values for the Grid container by individual fields. For more advanced controls, click 'Switch Controls'.</p>
          <hr />
          <p>Grid Template Columns:</p>

          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Column 1: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="col-input-1" placeholder="1" min="1"/>

              <select name="" id="col-sel-1">
                <option value="fr">fr</option>
                <option value="px">px</option>
                <option value="%">%</option>
                <option value="auto">auto</option>
              </select>

            </div>
          </div>

          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc2">Column 2: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="col-input-2" placeholder="150" min="1"/>

              <select name="" id="col-sel-2">
                <option value="fr">fr</option>
                <option value="px" selected>px</option>
                <option value="%">%</option>
                <option value="auto">auto</option>
              </select>

            </div>
          </div>

          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Column 3: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="col-input-3" name="gtc" placeholder="1" min="1"/>

              <select name="" id="col-sel-3">
                <option value="fr">fr</option>
                <option value="px">px</option>
                <option value="%">%</option>
                <option value="auto">auto</option>
              </select>

            </div>
          </div>

        </div> 
      
        <!--  GRID CONTAINER SINGLE INPUTS VIEW  -->
        <div class="control--single-input single-input">
          <p>Set values for the Grid container by property. <br />
            To change grid-item values, click 'Toggle View'.</p>
          <hr />
          <p>Grid Container</p> 
          <div class="code-example">
            <div class="codebox">
              <span class="selector-name">.grid-container <span class="bracket">{</span></span><br />
              <div class="single-input-wrapper">
                <span class="prop-name">grid-template-columns:</span>
                <span class="value">
                  <input class="grid-single-input" id="col-single-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-auto-columns:</span>
                <span class="value">
                  <input class="grid-single-input" id="auto-col-single-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-template-rows:</span>
                <span class="value">
                  <input class="grid-single-input" id="row-single-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-auto-rows:</span>
                <span class="value">
                  <input class="grid-single-input" id="auto-row-single-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-auto-flow:</span>
                <span class="value">
                  <input class="grid-single-input" id="auto-flow-single-input" />
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-gap:</span>
                <span class="value">
                  <input class="grid-single-input" id="gap-single-input" />
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-template-areas:</span>
                <span class="value">
                  <textarea class="grid-single-input" id="areas-single-input" rows='5'>
                  </textarea>
                </span>
              </div>
              <span class="bracket bracket--close"> }</span>
              <br />
            </div>
          </div>
        </div>

          
        </section>
        <hr class='seperator' />
        
        <!--   GRID TEMPLATE ROWS   -->
        <section class="grid-controls__body">
        <div class="control--multiple-fields multiple-rows">
          <p>Grid Template Rows:</p>

          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Row 1: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="row-input-1" placeholder="120" min="1"/>

              <select name="" id="row-sel-1">
                <option value="fr">fr</option>
                <option value="px" selected>px</option>
                <option value="%">%</option>
                <option value="auto">auto</option>
              </select>

            </div>
          </div>

          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Row 2: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="row-input-2" placeholder="100" min="1"/>

              <select name="" id="row-sel-2">
                <option value="fr">fr</option>
                <option value="px" selected>px</option>
                <option value="%">%</option>
                <option value="auto">auto</option>
              </select>

            </div>
          </div>

        </div>
          
        </section>

        <hr class='seperator' />
        
        <!--   GRID GAP   -->
        <section class="grid-controls__body">
        <div class="control--multiple-fields multiple-gaps">
          
          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Grid Row Gap: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="gap-row-input"  placeholder="5" min="0"/>

              <select name="" id="gap-row-sel">
                <option value="px" selected>px</option>
                <option value="%">%</option>
              </select>

            </div>
          </div>
          
          <div class="controls__row">
            <div class="controls__row--title">
              <label for="gtc">Grid Column Gap: </label>
            </div>
            <div class="controls__row--area">
              <input type="text" id="gap-col-input" placeholder="5" min="0"/>

              <select name="" id="gap-col-sel">
                <option value="px" selected>px</option>
                <option value="%">%</option>
              </select>

            </div>
          </div>

          
        </div> <!-- End Multiple Fields -->

        </section>
        
        <hr class='seperator' />

        <!-- JUSTIFY ITEMS -->
        <section class="grid-controls__body">

          <div class="controls__row">
            <div class="controls__row--title">
              <label>Justify Items:</label>
            </div>
            <div class="controls__row--area controls__row--stretch">

              <select name="" id="justify-items-sel">
                <option value="stretch" selected>stretch</option>
                <option value="start">start</option>
                <option value="center">center</option>
                <option value="end">end</option>
              </select>

            </div>
          </div>

           <!--   ALIGN ITEMS    -->
          <div class="controls__row">
            <div class="controls__row--title">
              <label>Align Items:</label>
            </div>
            <div class="controls__row--area controls__row--stretch">

              <select name="" id="align-items-sel">
                <option value="stretch" selected>stretch</option>
                <option value="start">start</option>
                <option value="center">center</option>
                <option value="end">end</option>
              </select>

            </div>
          </div>
        
          <!--   JUSTIFY CONTENT   -->
          <div class="controls__row">
            <div class="controls__row--title">
              <label>Justify Content:</label>
            </div>
            <div class="controls__row--area controls__row--stretch">

              <select name="" id="justify-content-sel">
                <option value="start">start</option>
                <option value="center">center</option>
                <option value="end">end</option>
                <option value="stretch">stretch</option>
                <option value="space-around">space-around</option>
                <option value="space-between">space-between</option>
                <option value="space-evenly">space-evenly</option>
              </select>

            </div>
          </div>

          <!--   ALIGN CONTENT   -->
          <div class="controls__row">
            <div class="controls__row--title">
              <label>Align Content:</label>
            </div>
            <div class="controls__row--area controls__row--stretch">

              <select name="" id="align-content-sel">
                <option value="start">start</option>
                <option value="center">center</option>
                <option value="end">end</option>
                <option value="stretch">stretch</option>
                <option value="space-around">space-around</option>
                <option value="space-between">space-between</option>
                <option value="space-evenly">space-evenly</option>
              </select>

            </div>
          </div>
        
        </section>

      </div> <!-- End Grid Container Controls -->

      <!--  GRID ITEM INPUTS VIEW  -->
      <div class="grid-controls--items">
        <div class="control--single-item grid-items">
          <p>Set values for the individual Grid Items. Click on an Item to target its values and the selector will update.</p>
          <hr />
          <p>Grid Items</p> 
          
          <div class="code-example">
            <div class="codebox">
              <span class="selector-name" id="grid-item--dynamic">.grid__item-1</span> <span class="bracket"> {</span><br />
              <div class="single-input-wrapper">
                <span class="prop-name">grid-column:</span>
                <span class="value">
                  <input class="grid-item-input" id="column-item-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-row:</span>
                <span class="value">
                  <input class="grid-item-input" id="row-item-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">grid-area:</span>
                <span class="value">
                  <input class="grid-item-input" id="grid-area-input"/>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">justify-self:</span>
                <span class="value">
                  <select name="" class='grid-item-input' id="justify-self-sel">
                    <option value="stretch" selected>stretch</option>
                    <option value="start">start</option>
                    <option value="center">center</option>
                    <option value="end">end</option>
                  </select>
                </span>
              </div>
              
              <div class="single-input-wrapper">
                <span class="prop-name">align-self:</span>
                <span class="value">
                  <select name="" class='grid-item-input' id="align-self-sel">
                    <option value="stretch" selected>stretch</option>
                    <option value="start">start</option>
                    <option value="center">center</option>
                    <option value="end">end</option>
                  </select>
                </span>
              </div>
              <span class="bracket bracket--close"> }</span>
              
          </div>
      </div>


    </section>
    
    
  </div> <!-- End Grid Controls -->
  
  
  <div class="grid-container">
    <div class="grid__item" id="grid__item-1">1</div>
    <div class="grid__item" id="grid__item-2">2</div>
    <div class="grid__item" id="grid__item-3">3</div>
    <div class="grid__item" id="grid__item-4">4</div>
    <div class="grid__item" id="grid__item-5">5</div>
    <div class="grid__item" id="grid__item-6">6</div>
    <div class="grid__item" id="grid__item-7">7</div>
    <div class="grid__item" id="grid__item-8">8</div>
    <div class="grid__item" id="grid__item-9">9</div>
  </div>

</div>
!

CSS

            
              @import url('https://fonts.googleapis.com/css?family=Titillium+Web');

$bg: #d3e9ee;
$c1: #f74444; // btn
$c2: #44a4f7; // items
$c3: #3b99ab; // controls
$gap-size: 5px;

.demo-wrapper {
  margin: 0 auto;
  padding: 15px;
  width: 100%;
  height: 100vh;
  overflow-y: auto;
  max-width: 1400px;
  display: flex;
  align-items: stretch;
}

.grid-controls {
  margin: 0 0 0 15px;
  width: 35%;
  flex: 0 1 auto;
  background: $c3;
  color: #fff;
  font-size: 1.1rem;
  border-radius: 3px;
  overflow-y: auto;
  overflow-x: hidden;
  
  h3 {
    margin: 0 auto 10px;
    letter-spacing: 0.5px;
    text-align: center;
  }
  
  p {
    margin: 0 0 6px;
    font-weight: bold;
  }
  
  &__header {
    padding: 8px;
  }
  
  &__body {
    display: grid;
  }
  
}
.controls--wrapper {
  height: auto;
  width: 100%;
  display: flex;
}
.grid-controls--container,
.grid-controls--items {
  padding: 8px 14px 8px 8px;
  flex: 0 0 100%;
  transform: translateX(0);
  transition: 0.3s ease-out;
  
  &.slide {
    transform: translateX(-100%);
  }
}
.controls__row {
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  &--area {
    display: flex;
  }
  &--stretch {
    flex-direction: row-reverse;
    flex: 1 1 auto;
    
    select {
      width: 100%;
      max-width: 260px;
    }
  }
}

// --------------------------------
// Switch between states
.control--single-input,
.control--multiple-fields {
  grid-area: 1 / 1;
}

.control--single-input {
  height: 0;
  visibility: hidden;
  opacity: 0;
  transition: all 0.2s;
  
  &.visible {
    height: auto;
    visibility: visible;
    opacity: 1;
    transition: all 0.2s;
  }
}

.control--multiple-fields {
  height: auto;
  visibility: visible;
  opacity: 1;
  transition: all 0.2s;
  
  &.hidden {
    height: 0;
    visibility: hidden;
    opacity: 0;
    transition: all 0.2s;
  }
}

// ----------------------------------------------
// Code example related:
.code-example {
  margin-bottom: 15px;
  background: #3f3f3f !important;
  border-radius: 3px;
}
.single-input-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.grid-single-input,
.grid-item-input {
  width: 100%;
  border-radius: 3px;
  font-size: 0.935rem;
}
.codebox {
  padding: 8px 0 12px;
  font-size: 0.935rem;
  span {
    font-family: monospace;
    
    &.selector-name {
      display: inline-block;
      padding-left: 6px;
      margin-bottom: 6px;
      color: #EC5f67;
    }
    &.prop-name {
      padding-left: 20px;
      color: #99C794;      
    }
    &.value {      
      max-width: 215px;
      flex: 1 1 auto;
      padding: 2px 5px;
      color: #C594C5;
    }

    &.bracket {
      color: #ccc;
      padding-left: 6px;
    }
  }
}
.grid-user-input {
  width: 120px;
  border-radius: 3px;
}

// Form elements
select,input { 
  font-family: 'Titillium Web';
  font-size: 1rem;
  background-color: #fff;
  border: 1px solid #dbdbdb;
  outline: 0;
  height: 30px;
}
input {
  padding-left: 6px;
  border-radius: 3px 0 0 3px;
}
label {
  margin-right: 10px;
}
select {
  line-height: 1.25;
  padding-right: .625em;
  position: relative;
  vertical-align: top;
  color: #363636;
  cursor: pointer;
  display: block;
}

.btn {
  padding: 2px 18px;
  height: 30px;
  font: {
    family: inherit;
    size: 0.938rem;
  }
  border: none;
  outline: none;
  cursor: pointer;
  background: $c1;
  color: #fff;
  border-radius: 0 3px 3px 0;
  transition: 0.2s;
  &:hover {
    background: darken($c1, 5%);
  }
  
  &--add-control-row {
    height: 34px;
    margin-top: 10px;
    align-self: flex-start;
    border-radius: 3px;
  }
}

.grid-container {
  margin: 0 15px;
  padding: $gap-size;
  overflow-x: hidden;
  width: calc(65% - 15px);
  flex: 1 1 auto;
  border: 1px solid $c3;
  display: grid;
  border-radius: 3px;
}
.grid__item {
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: $c2;
  color: #fff;
  font-size: 1.2rem;
  border-radius: 3px;
  cursor: pointer;
}




html { 
  box-sizing: border-box; 
}
*, *::before, *::after {
  box-sizing: inherit;
}
body {
  margin: 0;
  padding: 0;
  height: 100vh;
  background: $bg;
  font: {
    size: 16px;
    family: 'Titillium Web';
  }
}
.seperator {
  display: block;
  margin: 20px 0;
  background: #fff;
  height: 1px;
  width: 95%;
  
  &.hidden {
    display: none;
  }
}

::-webkit-scrollbar-track {
	-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
	border-radius: 2px;
	background-color: #F5F5F5;
}

::-webkit-scrollbar {
	width: 10px;
	background-color: #F5F5F5;
}
::-webkit-scrollbar-thumb {
	border-radius: 3px;
	-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
	background-color: #555;
}
!

JS

            
              const gridContainer = document.querySelector('.grid-container');
const gridControls = document.querySelector('.grid-controls');
const gridSingleInputs = Array.from(document.getElementsByClassName('grid-single-input'));
const gridItemSingleInputs = Array.from(document.getElementsByClassName('grid-item-input'));
const clearButton = document.querySelector('.clear-fields');

// Attach event listeners to single inputs and parent of multiple fields.
function addListeners() {
  
  gridSingleInputs.forEach((input) => {
    input.addEventListener('blur', handleSingleFieldChange);
  });
  
  gridItemSingleInputs.forEach((input) => {
    if (input.id.includes('sel')) {
      input.addEventListener('change', handleSingleItemChange);
    } else {
      input.addEventListener('blur', handleSingleItemChange);
    };
  });
  
  gridControls.addEventListener('change', handleFieldsChange);
  gridContainer.addEventListener('click', getGridItem);
  clearButton.addEventListener('click', clearFields);
}


// Handle change on multiple fields view and call correct method to set vals.
function handleFieldsChange(e) {
  const control = e.target.id;

  if(control.startsWith('col')) {
    setGridTemplateProp(e.target, 'column');
  } else if (control.startsWith('row')) {
    setGridTemplateProp(e.target, 'row');
  } else if (control.startsWith('gap')) {
    setGridGap(e.target);
  } else if (control.startsWith('justify') || control.startsWith('align')) { 
    setItemAndContentAlignment(e.target);
  } 

}

// Container Single Field handler
function handleSingleFieldChange(e) {
  
  const inputValue = e.target.value.toLowerCase();
  const inputField = e.target.id;

  let propName;
  switch (inputField) {
    case 'col-single-input':
      propName = 'grid-template-columns';
      break;
    case 'auto-col-single-input':
      propName = 'grid-auto-columns';
      break;
    case 'row-single-input':
      propName = 'grid-template-rows';
      break;
    case 'auto-row-single-input':
      propName = 'grid-auto-rows';
      break;
    case 'auto-flow-single-input':
      propName = 'grid-auto-flow';
      break;
    case 'gap-single-input':
      propName = 'grid-gap';
      break;
    case 'areas-single-input':
      propName = 'grid-template-areas';
    default:
      break;
  }
  assignStyles(propName, inputValue);
  
}

// Single Item Event Handler
function handleSingleItemChange(e) {
  // Select which grid-item to manipulate by users click//id title
  const dynamicItemId = document.getElementById('grid-item--dynamic').textContent;
  const stripId = dynamicItemId.slice(1);
  const gridItem = document.getElementById(`${stripId}`);

  // Get fields user clicked on.
  const inputField = e.target.id;
  const selectField = document.getElementById(inputField);

  let inputValue;
  let propName;
  switch (inputField) {
    case 'column-item-input':
      inputValue = e.target.value.toLowerCase();
      propName = 'grid-column';
      break;
    case 'row-item-input':
      inputValue = e.target.value.toLowerCase();
      propName = 'grid-row';
      break;
    case 'grid-area-input':
      inputValue = e.target.value.toLowerCase();
      propName = 'grid-area';
      break;
    case 'justify-self-sel':
      inputValue = selectField.options[selectField.selectedIndex].value;
      propName = 'justify-self';
      break;
    case 'align-self-sel':
      inputValue = selectField.options[selectField.selectedIndex].value;
      propName = 'align-self';
      break;
    default:
      break;
  }
  assignStyles(propName, inputValue, gridItem);
  
}

function getGridItem(e) {
  const itemId = e.target.id;
  if (e.target && itemId.startsWith('grid__item')) {
    const gridItem = document.getElementById(e.target.id);
    const itemId = e.target.id;
    const itemHolder = document.getElementById('grid-item--dynamic');
    itemHolder.textContent = `.${itemId}`;
  }
}

// Handles assigning the user's styles to the Grid element (container / items)
function assignStyles(propName, valueString, gridElement = gridContainer) {
  Object.assign(gridElement.style, {
    [propName]: valueString
  });
}

// Set either grid-template-columns or grid-template-rows styles depending on argument passed.
function setGridTemplateProp(control, gridTemplateProp) {
  
  // Set some variables determined by if user has changed a grid-template column or row property
  const templateProp = (gridTemplateProp == 'column') ? 'col' : 'row';
  const propVal = `${templateProp}Val`;
  const propUnit = `${templateProp}Unit`;
  
  // Get all the fields from either row or columns to be able to loop over each one.
  const fieldsContainer = document.querySelector(`.multiple-${templateProp}s`);
  const templateControls = Array.from(fieldsContainer.getElementsByClassName('controls__row'));
  let propName = (gridTemplateProp == 'column') ? 'grid-template-columns' : 'grid-template-rows';

  let userInputValues = {};
  // Get input values from fields.
  for (let i = 0, j = templateControls.length; i < j; i++) {
    const selectOption = document.getElementById(`${templateProp}-sel-${i+1}`);
    Object.assign(userInputValues, {
      [propVal + (i+1)] : document.getElementById(`${templateProp}-input-${i+1}`).value,
      [propUnit + (i+1)] : selectOption.options[selectOption.selectedIndex].value,
    });
  }

  // If columnUnitN value is `auto`, set value to empty string
  Object.keys(userInputValues).forEach((key, i) => {
    if (userInputValues[key] == 'auto') {
      // get number from this columns key name to be able to set prev keys value to '';
      const controlId = `${propVal}${key.slice(key.length - 1)}`;
      userInputValues[controlId] = '';
    }
  })

  // Get current style of grid containers properties for grid template column/row.
  const currentStyle = (gridTemplateProp == 'column') ? gridContainer.style.gridTemplateColumns : gridContainer.style.gridTemplateRows;
  const currentValues = currentStyle.split(' ');

  // Set each column as a value string consisting of it's value and unit.
  let storeUserValues = {};
  for (let i = 0, j = (Object.keys(userInputValues).length / 2); i < j; i++) {
    storeUserValues[propVal + (i+1)] = `${userInputValues[propVal + (i+1)]}${userInputValues[propUnit + (i+1)]}`;
  }

  // get number off input id to determine which field user touched.
  const controlId = control.id.slice(control.id.length -1);

  // Update default value string definition to value user has supplied - index of column determined by controlId.
  Object.keys(storeUserValues).forEach((col) => {
    if (col.endsWith(controlId)) {
      currentValues[controlId - 1] = storeUserValues[col];
    }
  });
  // Use the updated values to pass on and update css property
  const valueString = currentValues.join(' ');
  assignStyles(propName, valueString);
}


function setGridGap(control) {
  
  const fieldsContainer = document.querySelector('.multiple-gaps');
  const templateControls = Array.from(fieldsContainer.getElementsByClassName('controls__row'));
  const propName = 'grid-gap';
  let userInputValues = {};

  // Get input values from fields.
  for (let i = 0, j = templateControls.length; i < j; i++) {
    const gapRowSel = document.getElementById(`gap-row-sel`);
    const gapColSel = document.getElementById(`gap-col-sel`);
    Object.assign(userInputValues, {
      [`rowGapVal`] : document.getElementById(`gap-row-input`).value,
      [`rowGapUnit`] : gapRowSel.options[gapRowSel.selectedIndex].value,
      [`colGapVal`] : document.getElementById(`gap-col-input`).value,
      [`colGapUnit`] : gapColSel.options[gapColSel.selectedIndex].value,
    });
  }

  // get default style of grid-gap (note: row comes before column for the shorthand).
  const currentStyle = gridContainer.style.gridGap;
  const currentValues = currentStyle.split(' ');
  
  // If user has entered fields, use those for gap values, otherwise use defaults.
  let rowGap = (userInputValues.rowGapVal !== '') ? userInputValues.rowGapVal : currentValues[0];
  let colGap = (userInputValues.colGapVal !== '') ? userInputValues.colGapVal : currentValues[1];
  
  // check if using the default values - remove unit abberviation at end
  rowGap = rowGap.replace(/px|%/,'');
  colGap = colGap.replace(/px|%/,'');
  
  // Set value and unit together in object
  const storeUserValues = {
    gridRowGap: `${rowGap}${userInputValues.rowGapUnit}`,
    gridColGap: `${colGap}${userInputValues.colGapUnit}`,
  };
  
  const valueString = `${storeUserValues.gridRowGap} ${storeUserValues.gridColGap}`;
  assignStyles(propName, valueString);
  
}

// Set Justify Items / Align Items propertys
function setItemAndContentAlignment(control) {
  
  const selectControl = document.getElementById(control.id);
  const selectedOption = selectControl.options[selectControl.selectedIndex].value;
  
  let propName;
  switch (control.id) {
    case 'justify-items-sel':
      propName = 'justify-items';
      break;
    case 'align-items-sel':
      propName = 'align-items';
      break;
    case 'justify-content-sel':
      propName = 'justify-content';
      break;
    case 'align-content-sel':
      propName = 'align-content';
      break;
    default:
      break;
  }
  assignStyles(propName, selectedOption);

}

function setBasicDefaults() {
  const gridDefaults = {
    'grid-template-columns': '1fr 150px 1fr',
    'grid-template-rows': '180px 100px',
    'grid-auto-rows': '50px',
    'grid-gap': '5px 5px',
  };
  
  Object.keys(gridDefaults).forEach((key) => {
    const [ propName, valueString ] = [key, gridDefaults[key]]
    assignStyles(propName, valueString)
  });
  
}


function addControl() {
    
    // if e.target.id.beginsWith col
    // set control with ids on input and sel with that id.
    // check length of current parent container to get numeric ID

    // use this for add row and column.

    // out same control__row
}

function clearFields() {
  const gridItems = Array.from(document.getElementsByClassName('grid__item'));
  gridContainer.setAttribute(`style`, 
    `grid-template-columns: initial; 
    grid-template-rows: initial; 
    grid-auto-columns: initial; 
    grid-auto-rows: initial;
    grid-gap: initial;`
  );
  gridItems.forEach((gridItem) => {
    gridItem.setAttribute(`style`, 
    `grid-area: initial;`                     
    );
  })
}

setBasicDefaults();
addListeners();

// --------------------------------------
// Toggle Views

const toggleControls = document.querySelector('.toggle-controls');
const containerControls = document.querySelector('.grid-controls--container');
const itemControls = document.querySelector('.grid-controls--items');
toggleControls.addEventListener('click', function(){
  containerControls.classList.toggle('slide');
  itemControls.classList.toggle('slide');
});

const toggleView = document.querySelector('.toggle-view');
const singleView = document.querySelector('.single-input');
const fieldsCol = document.querySelector('.multiple-cols');
const fieldsRow = document.querySelector('.multiple-rows');
const fieldsGap = document.querySelector('.multiple-gaps');
const allLines = Array.from(document.getElementsByClassName('seperator'));

toggleView.addEventListener('click', function(){
  fieldsCol.classList.toggle('hidden');
  fieldsRow.classList.toggle('hidden');
  fieldsGap.classList.toggle('hidden');
  singleView.classList.toggle('visible');
  
  allLines.forEach((seperator) => {
    seperator.classList.toggle('hidden');
  })
});


// Reset values on user input whens hidden.
!
999px
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