React

by Andrew Bone

CSS

body {
  background: #F5F5F5;
  margin: 10px;
}

.md_switch {
  display: inline-flex;
  font-family: "Open Sans";
  align-items: center;
  margin: 5px 0;
}

.md_switch .md_switch__toggle {
  position: relative;
  cursor: pointer;
}

.md_switch [type=checkbox] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* default states */

.md_switch .md_switch__toggle::before,
.md_switch .md_switch__toggle::after {
  content: '';
  display: block;
  margin: 0 3px;
  transition: all 100ms cubic-bezier(0.4, 0.0, 0.2, 1);
  background: #BDBDBD;
}

.md_switch .md_switch__toggle::before {
  height: 1.3em;
  width: 3em;
  border-radius: 0.65em;
  opacity: 0.6;
}

.md_switch .md_switch__toggle::after {
  position: absolute;
  top: 50%;
  transform: translate(0, -50%);
  height: 1.7em;
  width: 1.7em;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0,0,0,0.2), 0 0 2px rgba(0,0,0,0.4);
}

/* special states */
.md_switch [type=checkbox]:focus+.md_switch__toggle {
  outline: #5d9dd5 solid 1px;
  box-shadow: 0 0 8px #5e9ed6;
}

.md_switch [type=checkbox]:disabled+.md_switch__toggle {
  cursor: not-allowed;
  filter: grayscale(100%);
  opacity: 0.6;
}

.md_switch [type=checkbox]:disabled+.md_switch__toggle::after {
  box-shadow: none;
}

/* checked states */

.md_switch [type=checkbox]:checked+.md_switch__toggle::before,
.md_switch [type=checkbox]:checked+.md_switch__toggle::after{
  background: #00897B;
}

.md_switch [type=checkbox]:checked+.md_switch__toggle::after {
  transform: translate(calc(3em - 100%), -50%);
}

React

class MaterialSwitch extends React.Component {
  constructor(props) {
    super(props);
    
    this.state = {
      checked: props.defaultChecked
    }
    
    this.changeHandler = this.changeHandler.bind(this);
  }
  
  render() {
    const {children, readonly, disabled, defaultChecked } = this.props;
    return (
      <label class="md_switch">
        <input 
          readonly={readonly}
          disabled={disabled}
          defaultChecked={defaultChecked}
          onChange={this.changeHandler}
          type="checkbox" 
        />
        <span class="md_switch__toggle"></span>
        {children}
      </label>
    )
  }
  
  /**
   * Update checked on change
   *
   * @param {string} text
  */
  changeHandler(event) {
    this.setState({checked: event.target.checked})
  }
  
}

ReactDOM.render((
  <div>
    <MaterialSwitch>Toggle Switch</MaterialSwitch>
  </div>
), document.querySelector("body"))