ReactStrap 处理输入隐式提交

Question

每当我在输入文本框上按下 Enter 时，来自输入元素的隐式提交会触发提交并重新加载页面：

import React, { Component } from "react";
import { Col, Button, Form, FormGroup, Label, Input } from "reactstrap";
import "./SearchBar.css";

class SearchBar extends Component {
constructor(props) {
    super(props);
    this.state = {
      term: ""
    };

    this.handleTermChange = this.handleTermChange.bind(this);
    this.handleSearch = this.handleSearch.bind(this);
    this.handleEnter = this.handleEnter.bind(this);
}

handleTermChange(e) {
    this.setState({ term: e.target.value });
}

handleSearch() {
    this.props.searchEngine(this.state.term);
}

handleEnter(e) {
    if (e.key === 13) {
      this.handleSearch();
    }
}

render() {
    return (
    <Form className="searchbox">
        <FormGroup row>
        <Label for="searchId" sm={2}>
            Search Engine
        </Label>
        <Col sm={10}>
            <Input
            type="text"
            placeholder="Enter Sth"
            onChange={this.handleTermChange}
            onKeyDown={this.handleEnter}
            />
        </Col>
        </FormGroup>

        <FormGroup>
        <Col sm="2">
            <div className="">
            <Button
                onClick={this.handleSearch}
                className="btn"
            >
                Submit
            </Button>
            </div>
        </Col>
        </FormGroup>
    </Form>
    );
}
}

export default SearchBar;

我只想用上面的处理程序触发搜索功能，但要避免隐式提交，即单击 Submit 按钮时的相同功能。否则它只是重新加载页面并清除返回的结果。

我做错了什么？我以前没有用基本相同的模式遇到过这个问题。

依赖关系：

"reactstrap": "^6.5.0"
"bootstrap": "^4.1.3"
"react": "^16.6.3"
"react-dom": "^16.6.3"
"react-scripts": "2.1.1"

Answer 1

您需要防止按下 Enter 键时的默认事件。

handleEnter(e) {
    if (e.key === 13) {
     e.preventDefault();
     this.handleSearch();
    }
}

e.preventDefault() 告诉用户代理，如果事件没有得到显式处理，则不应像通常那样执行其默认操作。

Answer 2

我发现是<Form>元素触发了隐式提交。我将其更改为 <Form className="searchbox" onSubmit={this.handleSubmit}> 并添加一个新函数：

handleSubmit(e) { 
    e.preventDefault(); 
    this.handleSearch();
}

根据问题修改的完整工作代码：

import React, { Component } from "react";
import { Col, Button, Form, FormGroup, Label, Input } from "reactstrap";
import "./SearchBar.css";

class SearchBar extends Component {
constructor(props) {
    super(props);
        this.state = {
            term: ""
        };

    this.handleTermChange = this.handleTermChange.bind(this);
    this.handleSearch = this.handleSearch.bind(this);
    this.handleEnter = this.handleEnter.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
    }

    handleTermChange(e) {
        this.setState({ term: e.target.value });
    }

    handleSearch() {
        this.props.searchEngine(this.state.term);
    }

    handleEnter(e) {
        if (e.key === 13) {
        this.handleSearch();
        }
    }

    handleSubmit(e) {
        e.preventDefault();
        this.handleSearch();
   }

render() {
    return (
    <Form className="searchbox" onSubmit={this.handleSubmit}>
        <FormGroup row>
        <Label for="searchId" sm={2}>
            Search Engine
        </Label>
        <Col sm={10}>
            <Input
            type="text"
            placeholder="Enter Sth"
            onChange={this.handleTermChange}
            onKeyDown={this.handleEnter}
            />
        </Col>
        </FormGroup>

        <FormGroup>
        <Col sm="2">
            <div className="">
            <Button
                onClick={this.handleSearch}
                className="btn"
            >
                Submit
            </Button>
            </div>
        </Col>
        </FormGroup>
    </Form>
    );
}
}

export default SearchBar;

ReactStrap 处理输入隐式提交

ReactStrap Handle Input Implicit Submit

javascript

reactjs

bootstrap-4

reactstrap