dynamically load javascript

dynamic loading of javascript is a technique that allows you to load javascript code into a web page at runtime. this can be useful for improving performance by loading scripts only when they are needed, or for adding functionality to a page based on user interactions.

there are a few different methods for dynamically loading javascript, but one commonly used approach involves creating a new `script` element and appending it to the document.

here's a step-by-step tutorial on how to dynamically load javascript in a web page:

step 1: create a function to load the javascript file dynamically

this function takes two parameters: `url` (the url of the javascript file to load) and `callback` (a function to execute once the script has finished loading).

step 2: call the `loadscript` function with the url of the javascript file you want to load

step 3: use the dynamically loaded javascript

once the script has been loaded, you can use any functions or variables defined in it just like you would with any other javascript code.

and that's it! you've successfully loaded javascript dynamically in your web page.

remember to handle errors and edge cases, such as checking if the script has already been loaded or handling script loading failures.

dynamic loading of javascript can be a powerful tool for optimizing performance and adding flexibility to your web applications.

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