将 ES6 箭头函数转换为 ES5 函数 JavaScript

Question

What is the ES5 equivalent of the below code?

Object.keys($location.search()).forEach( key => ($location.search()[key] == null || $location.search()[key] == "") && $location.search([key], null));

I tried to replace the => with just a simple = , that resulted in a error however.

How do I convert the above code to the ES5 syntax.

Answer 1

You can either convert it into a function yourself or use something like Babel to do it for you

Object.keys($location.search()).forEach(function (key) {
    return ($location.search()[key] == null || $location.search()[key] == "") && $location.search([key], null)
});

Answer 2

To replace a arrow function you can´t just use a =, you need to use a regular function statement like:

(param) => {
  //code block 
}

function(param) {
  //code block
}

Answer 3

Just use an anonymous function (see documentation on forEach ):

Object.keys($location.search()).forEach(function (key) {
    return ($location.search()[key] == null || $location.search()[key] == "")
            && $location.search([key], null);
});