【报错】 “TypeError: Cannot read properties of undefined (reading ‘split‘)“

简介: 【报错】 “TypeError: Cannot read properties of undefined (reading ‘split‘)“

报错问题

在使用 split()方法分割成字符串时,报红信息如下:Cannot read properties of undefined (reading ‘split‘)

报错分析

在对数据进行分割以前,要先判断当前数据是否存在为空的情况;如果不对数据进行判断,可能会导致异常。所以在调用 splid() 函数前,需要对当前需要进行分割的数据进行非空的判断(或者是当数据不为空的情况下调用)。

报错解决

在对数据进行分割以前,要先判断当前数据是否存在为空的情况;如果不对数据进行判断,可能会导致异常。所以在调用 splid() 函数前,需要对当前需要进行分割的数据进行非空的判断(或者是当数据不为空的情况下调用)。

const imgUrl = "https://tu.cloud.cn/flower/flower-size.jpg?size=1800";
// 当数据不为空的情况下
if(imgUrl) {
   
  // 截取 再拼接新的字符串
  const newImgUrl = imgUrl.split('?')[0] + "?size=600";
  console.log(newImgUrl);  //https://tu.cloud.cn/flower/flower-size.jpg?size=600
}
相关文章
|
3月前
|
存储 JavaScript 前端开发
成功解决:Cannot read properties of undefined (reading ‘commit‘)
这篇文章提供了解决Vuex中"Cannot read properties of undefined (reading 'commit')"错误的两种方法:检查模板中的数据属性是否存在,以及确保在Vue实例中正确挂载了store对象。
成功解决:Cannot read properties of undefined (reading ‘commit‘)
|
3月前
|
定位技术 Apache
Echarts——Invalid geoJson format Cannot read property 'length' of undefined
Echarts——Invalid geoJson format Cannot read property 'length' of undefined
87 0
|
3月前
|
JavaScript
VUE——filemanager-webpack-plugin报错TypeError: Cannot read property 'isFile' of undefined
VUE——filemanager-webpack-plugin报错TypeError: Cannot read property 'isFile' of undefined
74 0
|
5月前
|
前端开发 小程序 JavaScript
微信小程序-Unhandled promise rejection TypeError: Cannot read property ‘get‘ of undefined
微信小程序-Unhandled promise rejection TypeError: Cannot read property ‘get‘ of undefined
|
6月前
|
资源调度 前端开发
编译第三方前端项目时候出现Syntax Error: TypeError: Cannot set properties of undefined (setting ‘parent‘)
编译第三方前端项目时候出现Syntax Error: TypeError: Cannot set properties of undefined (setting ‘parent‘)
473 0
|
3月前
|
前端开发 JavaScript
VUE——Uncaught (in promise) TypeError: Cannot read property '__esModule' of undefined
VUE——Uncaught (in promise) TypeError: Cannot read property '__esModule' of undefined
72 0
TypeError: Cannot set properties of undefined (setting ‘resdata‘),res定义数据出现的问题,定义的方法用this换成that
TypeError: Cannot set properties of undefined (setting ‘resdata‘),res定义数据出现的问题,定义的方法用this换成that
Cannot read properties of undefined (reading ‘row‘)
Cannot read properties of undefined (reading ‘row‘)
Cannot read properties of undefined (reading ‘post‘)
Cannot read properties of undefined (reading ‘post‘)
|
4月前
|
JavaScript
element-ui Cannot read properties of undefined (reading ‘name‘),data中写成集合的形式
element-ui Cannot read properties of undefined (reading ‘name‘),data中写成集合的形式