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iife vs simple statement behavior with document.title


iife vs simple statement behavior with document.title

By : Aaron Escobar
Date : January 12 2021, 01:40 AM
fixed the issue. Will look into that further That's basically just what bookmarklets do - if the expression that follows the javascript: resolves to something other than undefined (such as a string), the current page will be replaced. So, one option to run arbitrary Javascript is to run an IIFE that doesn't return anything. More explanation available here.
The behavior may vary across browsers.
code :
javascript: (document.title = 'www.google.com', undefined)


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Title tag loaded by JS document.title function not changing title tag in source view

Title tag loaded by JS document.title function not changing title tag in source view


By : C. Herman
Date : March 29 2020, 07:55 AM
hop of those help? The 'source' is just that ... it is the code returned from the server. In most cases to see DOM changes made after loading you will need to look at the code in Firebug or Chrome Inspector.
IIFE inside $(document).ready or the other way around

IIFE inside $(document).ready or the other way around


By : Andrea Caspani - Uni
Date : March 29 2020, 07:55 AM
Hope this helps Some may argue that this is a matter of style/opinion, but if you consider the typical goal of an IIFE in that context I believe the answer is yes, it is acceptable to use your alternative way, but there is a potential drawback.
Wikipedia has to say that:
code :
// Non-DOM-ready-required code here (NOT scope-safe)
jQuery(function() {
    (function($) {
        //...
        // DOM-ready-required code here
        //...
    })(jQuery);
});
(function($) {
    // Non-DOM-ready-required code here (scope-safe)
    $(function() {
      //...
      // DOM-ready-required code here
      //...
    });
 })(jQuery);
Unexpected behavior: Javascript, setTimeout(), and IIFE

Unexpected behavior: Javascript, setTimeout(), and IIFE


By : James
Date : March 29 2020, 07:55 AM
Any of those help Javascript, Event loop, setTimeout, IIFE, closure , In
code :
setTimeout(
    function(index) { 
        console.log(index);
    }(i), 5000
);
setTimeout(makeFn('foo'), 5000);
    function(index) { 
        console.log(index);
    }(i)
setTimeout(undefined, 5000);
for (var i = 0; i < 3; i++) {
  ((i) => {
    setTimeout(
      function() {
        console.log(i);
      }, 500
    );
    console.log("loop=" + i);
  })(i);
}
for (let i = 0; i < 3; i++) {
  setTimeout(
    function() {
      console.log(i);
    }, 500
  );
  console.log("loop=" + i);
}
Unexpected behavior - Async Await when required with IIFE?

Unexpected behavior - Async Await when required with IIFE?


By : user3210615
Date : March 29 2020, 07:55 AM
With these it helps It's a very wrong statement async-await won't work when requiring a module which has an IIFE. Actual output is different from the expected output because of synchronous nature of require not because of IIFE.
You can get output in the order of 1,2,3(after waiting for 1000ms), 4 ,5 if you use any asynchronous require function.
code :
const asyncRequire = require('./async-require');

async function abc() {
    console.log(1)
    let computeFunction = await asyncRequire("./test2.js");
    console.log(4)
    computeFunction()
    return null;
}

(async () => { await abc() })();
function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

await (async () => {
    console.log(2)
    // some connection initialization
    await sleep(1000)
    console.log(3)
    return null;
})();

module.exports = async () => {
    // does some computation with those connections
    console.log(5)
    return null;
}
const fs = require('fs');
module.exports = async path=>{
    return new Promise((success, fail)=>{
        fs.readFile(path, async (error, file)=>{
            const myModule = {};
            await eval(`(async (module)=>{ ${file.toString()} })(myModule);`);
            success(myModule.exports);
        }); 
    })
}
difference on behavior when running javascript code with function and IIFE

difference on behavior when running javascript code with function and IIFE


By : user3639851
Date : March 29 2020, 07:55 AM
help you fix your problem Sure - they'll behave identically. You might choose one or the other for various reasons, perhaps depending on the context of the code and how you expect the code to evolve. For example, if there might be a need to re-use the function, then you would choose the named function approach. I can't see much point in the ugly verbosity of (1) though.
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