以下是下面给出的代码,请帮我,因为我在脚本标签上遇到错误,并且它可以轻松地运行在简单的html文件上,但不能在reactjs中运行。
当我启动npm时,它说行号。这有错误,并且无法运行
./ src / topbar / Navbar.js语法错误: C:/Users/root/mft/src/topbar/Navbar.js:意外的令牌,预期的} (34:62)32 | 33 |函数openNav(){> 34 | document.getElementById(“ mySidenav”)。style.width =“ 250px”; | ^ 35 | document.getElementById(“ box1”)。style.width =“ 100%”; 36 | } 37 |
import React from 'react';
import './Navbar.css';
class Navbar extends React.Component {
render(){
return(
<div id = "navbar">
<div class ="box">
<div class="side" onclick={openNav()}>
<div class="line-separator"></div>
<div class="line-separator"></div>
<div class="line-separator"></div>
</div>
<h1 class="right">A1MAN </h1>
<div class="text">
<h1>A1MAN </h1>
</div>
</div>
<div id="box1" class="back">
<div href class="closebtn" onclick={closeNav()}></div>
</div>
<div id="mySidenav" class="sidenav">
<a href="">About</a>
<a href="">Services</a>
<a href="">Clients</a>
<a href="">Contact</a>
</div>
<img alt="flower" src="http://www.byui.edu/images/agriculture-life-sciences/flower.jpg"/>
<script>
</script>
</div>
);
function openNav() {
document.getElementById("mySidenav").style.width="250px";
document.getElementById("box1").style.width = "100%";
}
function closeNav() {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("box1").style.width = "0";
}
}
}
export default Navbar;
答案 0 :(得分:0)
我认为错误的原因是闭合的冰壶不匹配。
import React from 'react';
import './Navbar.css';
class Navbar extends React.Component {
render() {
return (
<div id = "navbar">
...
<img alt="flower" src="http://www.byui.edu/images/agriculture-life-sciences/flower.jpg"/>
</div>);
} // <-------------------------------- This was misplaced
// These methods belong on the component class, not inside a script tag
openNav() {
document.getElementById("mySidenav").style.width="250px";
document.getElementById("box1").style.width = "100%";
}
closeNav() {
document.getElementById("mySidenav").style.width = "0";
document.getElementById("box1").style.width = "0";
}
}
export default Navbar;
但是,示例中有一些反模式:
不要使用<script>
标签:请使用component methods。
不要使用document
:使用状态(例如isOpen
)来应用类或绑定宽度样式,或者使用refs。