reactjs - Trying to create a controlled switcher button -


i've picked code online (it's high in google results) : https://codepen.io/builtbyedgar/pen/jwovyq

but i've grown annoyed it's code.

i'm trying have duo of these buttons default state on , having both off not allowed. ui behavior i've chosen re-enable other if it's sibling being turned off :

ononeclick() {     let {         two,         one,     } = this.state;      if (two) {         1 = !one;     } else if (one) {         2 = !two;         1 = !two;     } else {         1 = !one;     }      this.setstate({         one,         two,     });     this.props.callback({         one,         two,     }); } ontwoclick() {     let {         two,         one,     } = this.state;      if (one) {         2 = !two;     } else if (two) {         2 = !two;         1 = !one;     } else {         2 = !two;     }      this.setstate({         one,         two,     });     this.props.callback({         one,         two,     }); }

and render:

     <div>         <div classname="switch-container">             <label>                 <input                     onchange={this.ononeclick}                     type="checkbox"                     classname="switch"                     value={this.state.one}                     checked={this.state.one}                 />                 <div>                     <span><g classname="icon icon-toolbar grid-view" /></span>                     <span><g classname="icon icon-toolbar ticket-view" /></span>                     <div />                 </div>             </label>         </div>         1     </div>     <div>         <div classname="switch-container">             <label>                 <input                     onchange={this.ontwoclick}                     type="checkbox"                     classname="switch"                     value={this.state.two}                     checked={this.state.two}                 />                 <div>                     <span><g classname="icon icon-toolbar grid-view" /></span>                     <span><g classname="icon icon-toolbar ticket-view" /></span>                     <div />                 </div>             </label>         </div>         2     </div>

simple enough right?

problem react hates switcher input of type "checkbox" : error message

and can see i've done best avoid happening think isn't in cards have input type , change it's checked state other human.

so i'm thinking maybe can solve issue reconstructing checkbox divs. (the label tag in violation of eslint)

answered jlaitio :

and here's added (top part of file props declaration , constructor) :

const proptypes = {     value: react.proptypes.object,     type: react.proptypes.string,     callback: react.proptypes.func,     one: react.proptypes.bool,     two: react.proptypes.bool, };  const defaultprops = {     callback: () => {},     onchange: () => {     },     value: { type: '' },     one: true,     two: true, };    class providerinfoscomponent extends component {     constructor(props) {         super(props);         const initialvalue = props.value;         this.state = {             ...initialvalue,             one: this.props.one,             two: this.props.two,         };         this.ononeclick = this.ononeclick.bind(this);         this.ontwoclick = this.ontwoclick.bind(this);     }

you error, if @ any point value attribute not set, or set value undefined, , subsequently existing react state value.

my best guess constructor not initialize one , two, hence value being undefined start with. when have value, component transfers being uncontrolled (="component state independent of react") controlled(="component state tied directly react state").


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