Daily Archives: February 22, 2020

在javascript function中，如果要強制使用new，可以參考以下nodejs cluster/worker.js的範例 他這邊利用檢查this是否是instanceof Worker，在一般情況下 https://www.w3schools.com/js/js_this.asp In a function, this refers to the global object. In a function, in strict mode, this is undefined. 但是在new operator下 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/new The new keyword does the following things:1. Creates a blank, plain JavaScript object;2. Links (sets the constructor of) this object to … Continue reading →