JavaScript method to change the original object valueOf_javascript tips

The example in this article describes how JavaScript changes the valueOf of the original object. Share it with everyone for your reference. The specific analysis is as follows:

Objects in JS all contain the valueOf method. We can replace the valueOf of the original object with a custom valueOf function

function foo() {
  this.valueOf = function() {
   return 'this is my value';
  }
}
var bar = new foo();
Print( bar ); // prints: this is my value
Print( bar == 'this is my value' ) // prints: true
Print( bar === 'this is my value' ) // prints: false

I hope this article will be helpful to everyone’s JavaScript programming design.