Question

每当我将重点放在“输入”文本框上时按Enter键，Input元素的隐式提交都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;

我只想使用上述处理程序来触发搜索功能，但要避免隐式提交，即单击Submit按钮时使用相同的功能。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？我以前从未遇到过使用相同模式的问题。

依赖项：

“ restraps”：“ ^ 6.5.0”
“引导程序”：“ ^ 4.1.3”
“反应”：“ ^ 16.6.3”
“ react-dom”：“ ^ 16.6.3”
“反应脚本”：“ 2.1.1”

Answer 1

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}>并添加一个新功能：

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

完整的工作代码已从问题中修改：

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;

Answer 2

您需要防止在按下Enter键时发生默认事件。

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

e.preventDefault()告诉用户代理，如果未明确处理事件，则不应像通常那样采取其默认操作。

ReactStrap句柄输入隐式提交

2 个答案: