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View Code? Open in Web Editor NEW总结,积累,分享,传播JavaScript各模块核心知识点文章全集,欢迎star,issue(勿fork,内容可能随时修改)。webpack核心内容部分请查看专栏: https://github.com/liangklfangl/webpack-core-usage
总结,积累,分享,传播JavaScript各模块核心知识点文章全集,欢迎star,issue(勿fork,内容可能随时修改)。webpack核心内容部分请查看专栏: https://github.com/liangklfangl/webpack-core-usage
有时候一些设计上的问题和想法,很想找人探讨,可惜身边同事都不搞这个,如有个小群,10来个人,随时交流心得就好
问题0:判断数组中某一个元素是否存在的优雅写法
function remove(array, item) {
var index = array.indexOf(item);
return !!~index && !!array.splice(index, 1);
}
其实可以用[1,2,3].includes(4)
/**
* 判断组件是否需要更新
* 因为传入的是immutable对象,所以可以直接通过is来得到组件是否需要重新渲染
* @param {Object} nextProps [description]
* @param {Object} nextState [description]
* @return {[type]} [description]
*/
shouldComponentUpdate(nextProps = {}, nextState = {}){
//这里只有当我们的information属性的值发生变化以后才会重新渲染
if (!Immutable.is(this.props.information, nextProps.information)) {
return true;
}
if (!Immutable.is(this.state, nextState)) {
return true;
}
return false;
}
npm install webpackcc -g
npm install
npm run dev
运行这些,项目运行不起来。。。
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