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<!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>If don't want to use JSX</title> </head> <body> <div class="container"> <div id="root"> <p>Wait...</p> </div> <div> <button onclick="getValue();">Output value to console</button> </div> </div> <script src="https://unpkg.com/react@16/umd/react.development.js" crossorigin></script> <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js" crossorigin></script> <script> const e = React.createElement; // コンポーネントの定義 class MyComponent extends React.Component { constructor(props, context, updater) { super(props, context, updater); console.log("props", props); console.log("context", context); console.log("updater", updater); this.state = { updatable: false, value: props.value, // initial value count: props.value.length, // status: props.status, }; } render() { return e("div", { ...this.props }, // Set name, className and ... e("input", { type: "text", value: this.state.value, // initial value onChange: this.cbOnChange, // change value }, ), e("span", null, this.state.count), e("span", null, this.state.error), ); } componentDidUpdate(event) { console.log("componentDidUpdate", this.state); } componentDidMount() { console.log("mounted"); } cbOnChange = (event) => { this.setState({ value: event.target.value }); this.setState({ count: event.target.value.length }); console.log(this.props.value); return false; } } // コンポーネントの定義 2 class MyComponentTextarea extends React.Component { constructor(props, context, updater) { super(props, context, updater); console.log("props", props); console.log("context", context); console.log("updater", updater); this.state = { updatable: false, value: props.value, // initial value count: props.value.length, // status: props.status, }; } render() { return e("div", { ...this.props }, // Set name, className and ... e("textarea", { value: this.state.value, // initial value onChange: this.cbOnChange, // change value }, ), e("span", null, this.state.count), e("span", null, this.state.error), ); } componentDidUpdate(event) { console.log("componentDidUpdate", this.state); } componentDidMount() { console.log("mounted"); } cbOnChange = (event) => { this.setState({ value: event.target.value }); this.setState({ count: event.target.value.length }); console.log(this.props.value); return false; } } // コンポーネントの定義 3 class MyComponentSelect extends React.Component { constructor(props, context, updater) { super(props, context, updater); console.log("props", props); console.log("context", context); console.log("updater", updater); this.state = { updatable: false, value: props.value, records: props.records, // initial value status: props.status }; } render() { let options = this.props.records.map(function (record, index) { // console.log("record", record, "index", index); return ( e("option", { key: index, value: record[0] }, record[1]) ); }); return e("div", { ...this.props }, // Set name, className and ... e("select", { type: "text", value: this.state.value, // initial value onChange: this.cbOnChange, // change value }, options, ), e("span", null, this.state.count), ); } componentDidUpdate(event) { console.log("componentDidUpdate", this.state); } componentDidMount() { console.log("componentDidMount"); } cbOnChange = (event) => { this.setState({ value: event.target.value }); console.log(this.props.value); } } this.refs = Array(); this.refs["input-text-1"] = React.createRef(); this.refs["input-text-2"] = React.createRef(); this.refs["textarea-1"] = React.createRef(); this.refs["select-1"] = React.createRef(); getValue = () => { console.log("getValue"); console.log(this.refs["input-text-1"].current.state.value); console.log(this.refs["input-text-2"].current.state.value); console.log(this.refs["textarea-1"].current.state.value); console.log(this.refs["select-1"].current.state.value); } // validation handleChange = (field, event) => { event.persist(); // console.log(field, event); const value = event.target.value; // console.log("value", value); // console.log(event.currentTarget); const current = this.refs[field].current; // console.log("current", current); switch (field) { case "input-text-1": case "input-text-2": if (value == "abc") { current.setState({ error: "" }); } else { current.setState({ error: "error" }); } break; case "textarea-1": if (value == "abc") { current.setState({ error: "" }); } else { current.setState({ error: "error" }); } break; default: } } const el = e("div", { className: "class1" }, e("p", {}, "Test"), e(MyComponent, { ref: this.refs["input-text-1"], className: "class2", value: "Test 123", onChange: this.handleChange.bind(this, "input-text-1") }), e(MyComponent, { ref: this.refs["input-text-2"], className: "class2", value: "default value", onChange: this.handleChange.bind(this, "input-text-2") }), e(MyComponentTextarea, { ref: this.refs["textarea-1"], name: "textarea-1", className: "class4", value: "default value....", onChange: this.handleChange.bind(this, "textarea-1") }), e(MyComponentSelect, { ref: this.refs["select-1"], className: "class3", value: 2, records: [ [1, "aa"], [2, "bb"], [3, "cc"], ] }), ); ReactDOM.render(el, document.getElementById("root")); </script> </body> <!-- https://www.youtube.com/watch?v=xJAqa0U_X50 https://getbootstrap.com/ https://reactjs.org/docs/add-react-to-a-website.html https://the2g.com/2796 https://stackoverflow.com/questions/41296668/reactjs-form-input-validation --> </html> |