一句话概括:for in是遍历(object)键名,for of是遍历(array)键值——for of 循环用来获取一对键值对中的值,而 for in 获取的是 键名。 for in 循环出的是key(并且key的类型是string),for of 循环出的是value。 for of 是es6引新引入的特性,修复了es5引入的for in 的不足。 for of 不能循环普通的对象...
while 语句只要指定条件为 true,就会执行循环。只要指定条件为 true,循环就可以一直执行代码。。JavaScript 支持不同类型的循环:for - 循环代码块一定的次数 for/in - 循环遍历对象的属性 while - 当指定的条件为 true 时循环指定的代码块 do/while - 同样当指定的条件为 true 时循环指定的代码块,但该语句会在...
循环体 } 定义的变量:就是对象的键 varperson = {"name":"jack","age":18,"love":['篮球','足球'] };for(iinperson){console.log(person[i]); }vararr = ['河南','河北','山东'];// 也可遍历数组// for(i in arr){// console.log(arr[i]);// } 输出结果:...
一句话概括:for in是遍历(object)键名,for of是遍历(array)键值——for of 循环用来获取一对键值对中的值,而 for in 获取的是 键名。 for in 循环出的是key(并且key的类型是string),for of 循环出的是value。 for of 是es6引新引入的特性,修复了es5引入的for in 的不足。 for of 不能循环普通的对象...
学过js的能从上边的代码中看出来,这和js的while基本无差。 将代码直译过来都是:当XXX条件成立的时候,执行XXX语句。直到条件不成立,就跳过while语句。 只不过python的特色是循环语句最后都会有自己的else语句。 当while条件语句为“假”、循环执行完毕过后,流程都会走到else里边执行缩进后的任务。就好像出关口、必经...
Best of both worlds. Nyan CSS lets you write plain CSS while reaping benefits of CSS-in-JS. Write a universal design system. You can reuse the same code anywhere starting from static HTML+CSS and ending with React and Vue.js without actually changing the CSS. ...
babel-plugin-css-in-js works seamlessly on both client and server. It has built-in support for media queries, pseudo-classes, attribute selectors, and theming. The plugin's options allow you to configure vendor-prefixing, minification, and class name compression. ...
The problem with tables is that it's hard to limit the height of them: if their content is too tall, the table will grow in height. I found two suggestions to overcome this online. The first suggestion was to give the container for the table ...
While there is still a way to go, it is true to state that the topic of accessibility in Vue.js is finally on the rise. A milestone for the topic was the addition of an“Accessibility” section in Vue’s official docs, which happened related to the release of Vue 3. ...
<method library="cus:smsApiService.js" name="SendSingleSms" static="true"> <parameters> <