[英]Dynamically change font-size to fit text into container
I created a react componentn whicht displays a label for an input filed.我创建了一个反应组件,它为输入字段显示 label。 Since the label text is of variable length I am trying to dynamically change the font size in order for the text to fit into the fix sized container.
由于 label 文本的长度可变,因此我试图动态更改字体大小以使文本适合固定大小的容器。
However, somehow my font-size does not get updated when the function gets called and I can not figure out why.但是,当调用 function 时,不知何故我的字体大小没有更新,我不知道为什么。
Here is my code:这是我的代码:
import React from "react";
class NewDrive extends React.Component {
constructor(props) {
super(props);
this.myOutputRef = React.createRef();
this.myOutputContainerRef = React.createRef();
this.size = 50 + "px";
}
componentDidMount() {
const output = this.myOutputRef.current;
const outputContainer = this.myOutputContainerRef.current;
this.size = parseFloat(this.size) - 40 + "px";
if (output.clientHeight >= outputContainer.clientHeight) {
this.componentDidMount();
}
}
render() {
return (
<form onSubmit={this.handleSubmit}>
<div className="input-wrapper">
<label ref={this.myOutputContainerRef}>
<div style={{ fontSize: this.size }} ref={this.myOutputRef}>
Gas cost
</div>
</label>
<input
type="text"
value={this.state.from}
onChange={this.handleChange}
/>
</div>
</form>
);
}
}
export default NewDrive;
I have also tried to update the fontzize with a call like output.style.fonSize =...
but this did not work either.我还尝试使用
output.style.fonSize =...
之类的调用来更新 fontzize,但这也不起作用。
Variable this.size
is not part of a state of component.变量
this.size
不是 state 组件的一部分。
Try editing the constructor尝试编辑构造函数
constructor(props) {
super(props);
this.state = {
size: 50 + "px",
}
this.myOutputRef = React.createRef();
this.myOutputContainerRef = React.createRef();
}
then update the size
variable by this.setState({size: parseFloat(this.size) - 40 + "px"})
, and lastly, change in the render method how you access the size
variable - ... style={{ fontSize: this.state.size }}...
然后通过
this.setState({size: parseFloat(this.size) - 40 + "px"})
更新size
变量,最后,在渲染方法中更改访问size
变量的方式 - ... style={{ fontSize: this.state.size }}...
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