我有一个简单的搜索栏React组件。
该组件是一个<div>
,包装了<input>
元素和<svg>
并通过样式化组件应用样式。我已经阅读了有关样式化组件的文档,但似乎找不到一种将:focus样式应用于嵌套子元素的方法,在本例中为<svg>
。
Expected behavior: The SVG should turn blue when the input is in :focus
Current behavior: The SVG color stays black no matter if the input is in :focus or not
我这里有一个CodePen,它显示:focus样式适用于输入,但不适用于<svg>
和我当前的组件:
import React, { useState } from "react";
import styled from "styled-components";
export const FilterTextbox = () => {
const [text, setText] = useState("");
const handleChange = (event: any) => {
setText(event.target.value);
};
return (
<StyledInput className={"inputWithIcon"}>
<Input
type="text"
value={text}
onChange={handleChange}
placeholder="Search"
/>
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 24 24"
width="36px"
height="36px"
>
<path d="M 13.261719 14.867188 L 15.742188 17.347656 C 15.363281 18.070313 15.324219 18.789063 15.722656 19.1875 L 20.25 23.714844 C 20.820313 24.285156 22.0625 23.972656 23.015625 23.015625 C 23.972656 22.058594 24.285156 20.820313 23.714844 20.25 L 19.191406 15.722656 C 18.789063 15.324219 18.070313 15.363281 17.347656 15.738281 L 14.867188 13.261719 Z M 8.5 0 C 3.804688 0 0 3.804688 0 8.5 C 0 13.195313 3.804688 17 8.5 17 C 13.195313 17 17 13.195313 17 8.5 C 17 3.804688 13.195313 0 8.5 0 Z M 8.5 15 C 4.910156 15 2 12.089844 2 8.5 C 2 4.910156 4.910156 2 8.5 2 C 12.089844 2 15 4.910156 15 8.5 C 15 12.089844 12.089844 15 8.5 15 Z" />
</svg>
</StyledInput>
);
};
const Input = styled.input`
height: 50px;
width: 100%;
border: 2px solid #aaa;
border-radius: 4px;
margin: 8px 0;
outline: none;
padding: 8px;
box-sizing: border-box;
transition: 0.3s;
padding-left: 50px;
font-size: 25px;
:focus {
border-color: dodgerBlue;
box-shadow: 0 0 8px 0 dodgerBlue;
}
`;
const StyledInput = styled.div`
svg {
position: absolute;
left: 0;
top: 8px;
padding: 9px 8px;
color: black;
transition: 0.3s;
:focus {
color: dodgerBlue;
}
}
/* &svg:focus {
color: dodgerBlue;
} */
&.inputWithIcon {
position: relative;
}
`;
答案 0 :(得分:2)
input
成为焦点,因此样式规则应包含input:focus
。
当输入具有焦点时,此CSS规则将以svg为目标:
input:focus + svg {
/* styling goes here */
}
这是使用直接HTML和CSS的示例。
div {
margin: 8px;
position: relative;
}
input {
height: 50px;
width: 100%;
border: 2px solid #aaa;
border-radius: 4px;
margin: 8px 0;
outline: none;
padding: 8px;
box-sizing: border-box;
transition: 0.3s;
padding-left: 50px;
font-size: 25px;
}
svg {
position: absolute;
left: 0;
top: 8px;
padding: 9px 8px;
color: black;
transition: 0.3s;
}
input:focus {
border-color: dodgerBlue;
box-shadow: 0 0 8px 0 dodgerBlue;
}
input:focus+svg {
fill: dodgerBlue;
}
<div>
<input>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="36px" height="36px">
<path d="M 13.261719 14.867188 L 15.742188 17.347656 C 15.363281 18.070313 15.324219 18.789063 15.722656 19.1875 L 20.25 23.714844 C 20.820313 24.285156 22.0625 23.972656 23.015625 23.015625 C 23.972656 22.058594 24.285156 20.820313 23.714844 20.25 L 19.191406 15.722656 C 18.789063 15.324219 18.070313 15.363281 17.347656 15.738281 L 14.867188 13.261719 Z M 8.5 0 C 3.804688 0 0 3.804688 0 8.5 C 0 13.195313 3.804688 17 8.5 17 C 13.195313 17 17 13.195313 17 8.5 C 17 3.804688 13.195313 0 8.5 0 Z M 8.5 15 C 4.910156 15 2 12.089844 2 8.5 C 2 4.910156 4.910156 2 8.5 2 C 12.089844 2 15 4.910156 15 8.5 C 15 12.089844 12.089844 15 8.5 15 Z" />
</svg>
</div>