Is it possible to assign a self-invoking function module to a variable so that calling the variable will trigger the function without using the () operator? I am looking for the variable to always hold the latest value based on the code inside the function module.
The code might look like this:
count = 0
var x = function(){ return count }();
alert x; // should output 0
count = 7
alert x; // should output 7
Thank you
To achieve this functionality, you can utilize a getter and employ Object.defineProperty. Here is an example implementation:
// Define the `customProperty` property on `document`
Object.defineProperty(document, 'customProperty', {
get: function() {
return Math.random();
}
});
console.log(document.customProperty);
console.log(document.customProperty); // Output will be different
Although direct access is not permitted, you can still manipulate object properties using getters and setters: https://developer.mozilla.org/en/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters
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