【发布时间】:2020-04-23 16:36:37
【问题描述】:
完整警告:
react-dom.development.js:2592 The specified value "" does not conform to the required format. The format is "#rrggbb" where rr, gg, bb are two-digit hexadecimal numbers.
代码运行良好。它正在做它应该做的事情,即:每个输入都会改变一旦按下按钮就会出现/更新的方块的背景颜色。
代码正常工作且警告未出现的唯一实例是在开发过程中,因为我弄乱了颜色输入,并且我试图更改与输入相同组件的 mockdiv 的背景.第二次我解除状态它开始表现得像这样。
但最好的部分是:当我告诉它到 Console.log 时 this.state.color.hex(这是改变背景颜色的值)它 console.logs "#00ff40" "#ff0000" "# 0000ff" AND "#ffff00" - 这就是为什么我不知道如何摆脱这个警告。
我不认为这个错误是由 changeHandler 函数引起的。我有很多不同版本的这个函数,它对这个警告影响不大。同样,此警告的另一个问题 (Warning when using color control in React JS) 具有另一个完全不同版本的 changeHandler 函数,并且仍然具有相同的错误。而且我最初为 value color 属性的所有实例提供了一个单一的 changeHandler 函数,但错误仍然存在。但如果是的话——如果这意味着摆脱这个警告,我很想知道如何改变它。
结构总结为:
复选框 => ButtonPerSquare =>主页
正方形 => SquaresWrapper =>主页
然后Home将两者合并,并在点击按钮时渲染方块,同样在Home上。
Checkbox.js: //我知道这不是一个合适的名称,但它已经在我的每个新项目的模板上被这样调用了。
import React from "react";
class CheckBoxes extends React.Component {
render() {
return (
<div>
<input
type={this.props.type}
className={this.props.class}
value={
this.props.class === "input1"
? this.props.color1
: this.props.class === "input2"
? this.props.color2
: this.props.class === "input3"
? this.props.color3
: this.props.class === "input4"
? this.props.color4
: console.log("blue")
}
onChange={
this.props.class === "input1"
? event => this.props.handleChange1(event)
: this.props.class === "input2"
? event => this.props.handleChange2(event)
: this.props.class === "input3"
? event => this.props.handleChange3(event)
: this.props.class === "input4"
? event => this.props.handleChange4(event)
: console.log("blue")
}
/>
<span>{this.props.sp1}</span>
</div>
);
}
}
export default CheckBoxes;
ButtonPerSquare.js:
import React, { Component } from "react";
import Checkboxes from "./Checkboxes";
// import "./../App.css";
const numbers = ["1", "2", "3", "4"];
// const colors = ["#ffffff", "#F7E3B3", "#71EB92", "#000fff"];
const classes = ["input1", "input2", "input3", "input4"];
class HeaderButtons extends Component {
render() {
//sp is for the span element in the Checkboxes function.
return (
<header className={this.props.headerClass}>
{numbers.map((nums, col) => {
// const keys = numbers[nums];
// console.log(keys);
return (
<Checkboxes
color1={this.props.color1}
color2={this.props.color2}
color3={this.props.color3}
color4={this.props.color4}
// color2={this.props.color2}
// color3={this.props.color3}
// color4={this.props.color4}
handleChange1={event => this.props.handleChange1(event)}
handleChange2={event => this.props.handleChange2(event)}
handleChange3={event => this.props.handleChange3(event)}
handleChange4={event => this.props.handleChange4(event)}
//this.props.handleChange}
background={this.props.background}
// className="ColorInput"
// color={this.props.color}
sp1={nums}
key={nums}
type="color"
// defaultValue={colors[col]}
class={classes[col]}
// value="red"
/>
);
})}
{/* one parethesis for return.. one curly for the funct... another parenthesis for map... and the blue curly THEN closing header */}
</header>
);
}
}
export default HeaderButtons;
Square.js
import React, { Component } from "react";
class Squares extends Component {
render() {
return (
<div
id={this.props.id}
className="Square"
style={{
background:
this.props.id === "square1"
? this.props.background1
: this.props.id === "square2"
? this.props.background2
: this.props.id === "square3"
? this.props.background3
: this.props.id === "square4"
? this.props.background4
: console.log("blue")
}}
>
Blue
</div>
);
}
}
export default Squares;
SquaresWrapper.js:
import React, { Component } from "react";
import Squares from "./Squares";
// import "./../App.css";
const numbers = ["1", "2", "3", "4"];
// const backgrounds = ["#ffffff", "#F7E3B3", "#71EB92", "#000fff"];
const classes = ["square1", "square2", "square3", "square4"];
class SquaresWrapper extends Component {
// constructor(props) {
// super(props);
// this.state = {};
// }
render() {
//sp is for the span element in the Checkboxes function.
return (
<section className={this.props.sectionClass}>
{numbers.map((nums, col) => {
// const keys = numbers[nums];
// console.log(keys);
return (
<Squares
id={classes[col]}
key={nums}
background1={this.props.background1}
background2={this.props.background2}
background3={this.props.background3}
background4={this.props.background4}
// value="red"
/>
);
})}
{/* one parethesis for return.. one curly for the funct... another parenthesis for map... and the blue curly THEN closing header */}
</section>
);
}
}
export default SquaresWrapper;
首页:
import React, { Component } from "react";
import HeaderButtons from "./ButtonPerSquare";
import ReactDOM from "react-dom";
// import Paragraph from "./Paragraph";
import SquaresWrapper from "./squaresWrapper";
class Home extends Component {
constructor(props) {
super(props);
this.state = {
color1: { hex: "" },
color2: { hex: "" },
color3: { hex: "" },
color4: { hex: "" }
};
}
render() {
return (
<div className="creatorDiv">
<HeaderButtons
color1={this.state.color1.hex}
color2={this.state.color2.hex}
color3={this.state.color3.hex}
color4={this.state.color4.hex}
handleChange1={event =>
this.setState({
color1: { hex: event.target.value }
})
}
handleChange2={event =>
this.setState({
color2: { hex: event.target.value }
})
}
handleChange3={event =>
this.setState({
color3: { hex: event.target.value }
})
}
handleChange4={event =>
this.setState({
color4: { hex: event.target.value }
})
}
headerClass="HeaderDiv"
/>
<button
onMouseDown={() =>
ReactDOM.render(
<SquaresWrapper
sectionClass="squaresWrapper"
background1={this.state.color1.hex}
// {this.state.color1}
background2={this.state.color2.hex}
// {this.state.color2}
background3={this.state.color3.hex}
// {this.state.color3}
background4={this.state.color4.hex}
// {this.state.color4}
/>,
document.getElementById("blue")
)
}
>
Create Color
</button>
<div id="blue"></div>
</div>
);
}
}
export default Home;
【问题讨论】:
-
是否有任何类型的堆栈跟踪可以告诉您错误出现在哪里?
-
@DrewReese 堆栈跟踪?
-
是的,它通常伴随控制台中的错误和警告。您可能需要扩展某些内容,以便为您提供有关错误/警告来源的更多详细信息。有时您可以直接单击错误,它会在发生错误的浏览器中打开源代码。只是转储一堆文件并说某处有错误不太可能让您快速获得帮助。我的预感是您有一些
undefined或格式错误的状态或 prop 值,它们很快就会被填充,因此您的应用程序运行良好,但偶尔会出现警告。 -
像
Home、this.state = { color1: { hex: "" }, color2: { hex: "" }, color3: { hex: "" }, color4: { hex: "" } };中的这样,这些都不是格式正确的十六进制颜色值。 -
用户界面?我知道它代表 UserInterface 但在这种情况下这意味着什么?沙盒上也没有显示任何警告。在我不断添加按钮后,我注意到它以某种方式消失了。所以我在考虑。我认为你指出 { color1: { hex: "" }, color2: { hex: "" } 是对的。我不断添加按钮后最大的不同是 { color1: { hex: "" }, color2: { hex: "" } 变成 => { color1: { hex: "white" }, color2: { hex : "white" } 作为默认值去那里。
标签: javascript reactjs input types colors