// ES13 之前通常用以下几种方式处理错误asyncfunctionerrFunc(){constrawResource=awaitaxios('/testError').catch(err=>{// 第一种thrownewError('我的错误信息:',err.message);// 第二种,需要连接错误信息constwrapErr=newError('Download raw resource failed');// 自己创建 一个 cause 属性来接收错误上...
ECMAScript 2022, the next update to the official standard behind JavaScript, has been formally approved, with new capabilities ranging from class elements to a top-level await capability. The ECMAScript 2022 specification was approved by ECMA International on June 22. But the features already are ...
ECMAScript 2022 or ES13 has been released in the month of June 2022 with some of important features in JavaScript. Top-level await In ES2022, it is possible to use await outside of the asynchronous (async) function scope, which makes it easier to use at the module level. This feaure ...
[2022-11-15]dev,javascript,es proposal (Ad, please don’t block) In this blog post, we look atthe ECMAScript proposal “RegExpvflag with set notation + properties of strings”by Markus Scherer and Mathias Bynens. The new flag/v#
classCar{#color;hasColor(){return#colorinthis;}}constcar=newCar();console.log(car.hasColor());// true; 通过运算符in,可以准确区分不同类中具有相同名称的私有字段。 代码语言:javascript 复制 classCar{#color;hasColor(){return#colorinthis;}}classHouse{#color;hasColor(){return#colorinthis;}}...
ECMAScript 5, the latest version available, (henceforth referred to as ES5) brings a suite of interesting features to the table. Most of these new features are designed to bring greater programming discipline to the language.I’m going to focus on Strict Mode—one of the features that ...
本文整理了在 2021 年进入 Stage 4 的 10 个提案,它们将会被吸纳进 ECMAScript 2022。 Class Fields 声明类的字段。 提案链接:https://github.com/tc39/proposal-class-fields 到目前为止,在 ES 规范中,类的字段定义和初始化是在类的构造函数中完成的。但是在新的提案中,类的字段可以在类的顶层被定义和初始...
本文整理了在 2021 年进入 Stage 4 的 10 个提案,它们将会被吸纳进 ECMAScript 2022。 Class Fields 声明类的字段。 提案链接:https://github.com/tc39/proposal-class-fields 到目前为止,在 ES 规范中,类的字段定义和初始化是在类的构造函数中完成的。但是在新的提案中,类的字段可以在类的顶层被定义和初始...
ECMAScript 2021 (13 features) ECMAScript 2022 (7 features) ECMAScript 2023 (14 features) ECMAScript 2024 (10 features) Second, I came up with some capability groups. Here I'm trying to be user-oriented as I believe we want to show what the web can do (and ignore its evolution...
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