This question already has answers here:
Does a browser truly read JavaScript line by line OR does it make multiple passes?
(6 answers)
How JavaScript interpreter interpret code?
(3 answers)
How does an interpreter run code?
(1 answer)
How does an interpreter interpret the code?
(4 answers)
Why does Java code need to be compiled but JavaScript code does not
(4 answers)
Closed 2 years ago.
It is true, that javascript works like this:
Does the interpreter pass 1 time throughout the code?
and the second time it executes the code?
If this is true, where can I find information that characterizes my question?
Related
This question already has answers here:
Does minified JavaScript code improve performance?
(7 answers)
What are the advantages of minified javascript code?
(4 answers)
Closed 1 year ago.
I've been itching to ask this question: Why, when I open js code from a website online, is the code written all on 1 line? Is this supposed to be some security thing?
This question already has answers here:
What's going on in this piece of Javascript?
(1 answer)
What is instance.constructor.constructor and how does it work?
(1 answer)
How is this function created? A = (0)['constructor']['constructor']
(1 answer)
Obfuscated Javascript in an exploit kit using Array's constructor
(2 answers)
Clever JavaScript to bypass eval method [duplicate]
(1 answer)
Closed 1 year ago.
I am involved in Application security and often times I've used
{{constructor.constructor('alert(1)')()}}
blindly in AngularJS applications to escape the sandbox in older versions. Recently I've been trying to understand what this really means and how it works. I tried reading about object constructors and understand that an object constructor points to the object type. so for example.
var a = new String;
console.log(a.constructor);
will print out String and if I do a.constructor.constructor this will print out {}
Now my question is how does object.constructor.constructor('ANY FUNCTION HERE')() lead to that function being executed in javascript
This question already has answers here:
How to pass text in a textbox to JavaScript function?
(7 answers)
Closed 2 years ago.
I'm trying to create something that allows people to execute a line of JS. I want to convert the string that people type into a function to execute on the page using the HTML tag
I've looked around and nothing is helping to this.
you can use eval();
example :
eval("console.log('hello')");
This question already has answers here:
PHP code is not being executed, but the code shows in the browser source code
(35 answers)
What is the difference between client-side and server-side programming?
(3 answers)
Closed 4 years ago.
i am trying to send php command from javascript using innerhtml but it send the command commented how can i fix that
document.getElementById('ThirdOption').innerHTML = "<?php DisplayLocation() ?>";
The result i got on html div is as following
<!--?php DisplayLocation() ?-->
This question already has answers here:
Why can I use a function before it's defined in JavaScript?
(7 answers)
Closed 10 years ago.
I have noticed that when coding in javascript, it doesn't matter if i declare the function before or after i call it. In other languages it will cause an exception, but when running javascript in chrome it works just fine. Is that only in chrome, or is that normal?
What you're seeing is function hoisting in action: http://elegantcode.com/2011/03/24/basic-javascript-part-12-function-hoisting