如何在 javascript 中传递变量

Question

I am building a bookmarlet based on this site: http://www.latentmotion.com/how-to-create-a-jquery-bookmarklet/

This is the code of bookmarlet:

javascript:(function(){
    var head=document.getElementsByTagName('head')0],
         script=document.createElement('script');
    script.type='text/javascript';
    script.src='http://myserver.com/bookmarlet-remote.js?' + Math.floor(Math.random()*99999);
    head.appendChild(script);
})(); 
void 0

How I can pass a variable from the bookmarlet (above code), to bookmarlet-remote.js?

I've tried after var myNewvar='myValue', without success, Any Idea?

Answer 1

All JS code on a page (including bookmarklet code and scripts included have) have access to the global scope. If you define a variable without the var prefix it will be available to all other scripts.

It might be a good idea to be explicit about this. do window.myVar = "foo"; to clearly signal that you are working with global variables.

Answer 2

Using var in the function makes it local to that function. To make it global you have to add it to the scope of the window , so:

window.newVariable = window.newVariable || 'Your new value here';

OR

window['newVariable'] = 'Your new value here';

Answer 3

You'd create a public variable.

window.rnd = Math.floor(Math.random()*99999);

In bookmarlet-remote.js you just access the variable.