意外令牌=节点8.4中的类属性

本文介绍了意外令牌=节点8.4中的类属性的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 在节点（v8.4）中运行以下代码running the following code in node (v8.4)class TodoStore { todos = []; get completedTodosCount() { return this.todos.filter( todo => todo.completed === true ).length; } report() { if (this.todos.length === 0) return "<none>"; return `Next todo: "${this.todos[0].task}". ` + `Progress: ${this.completedTodosCount}/${this.todos.length}`; } addTodo(task) { this.todos.push({ task: task, completed: false, assignee: null }); }}const todoStore = new TodoStore();todoStore.addTodo("read MobX tutorial");console.log(todoStore.report());todoStore.addTodo("try MobX");console.log(todoStore.report());todoStore.todos[0].completed = true;console.log(todoStore.report());todoStore.todos[1].task = "try MobX in own project";console.log(todoStore.report());todoStore.todos[0].task = "grok MobX tutorial";console.log(todoStore.report());给我以下错误： todos = []; ^SyntaxError: Unexpected token = at createScript (vm.js:74:10) at Object.runInThisContext (vm.js:116:10) at Module._compile (module.js:537:28) at Object.Module._extensions..js (module.js:584:10) at Module.load (module.js:507:32) at tryModuleLoad (module.js:470:12) at Function.Module._load (module.js:462:3) at Function.Module.runMain (module.js:609:10) at startup (bootstrap_node.js:158:16) at bootstrap_node.js:598:3推荐答案 更新 对实例类字段的支持始于节点> = 12 。任何版本的节点都不支持文学类属性，根据此表。您仍然必须在类构造函数中设置任何实例属性：Literal class properties are not supported by any version of node, according to this table. You'll still have to set any instance properties inside your class constructor:class TodoStore { constructor() { this.todos = []; } // ...}如果希望定义一个 static 属性，您可以在声明该类之后将其直接分配给 TodoStore 引用。 ：If you wish to define a static property, you'd assign that directly to the TodoStore reference, after the class has been declared:TodoStore.todos = []; 这篇关于意外令牌=节点8.4中的类属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 阿里云证书，YYDS！