Home Web Front-end JS Tutorial Call JavaScript or be called by JavaScript

Call JavaScript or be called by JavaScript

Nov 25, 2016 pm 01:37 PM

1. Calling Flex methods in JavaScript
In Flex, you can use ExternalInterface to call Flex methods by adding specified public methods to the list of callable methods in the Flex application. A method can be added to this list by calling addCallback() in a Flex application. addCallback registers an ActionScript method as a method that JavaScript and VBScript can call. The definition of the
addCallback() function is as follows:
addCallback(function_name:String, closure:Function):void The
function_name parameter is the method name called by the script in the Html page. The closure parameter is the local method to be called. This parameter can be a method or an object instance.

For example:

import flash.external.*;
public function myFunc():Number {
return 42;
}
public function initApp():void {
ExternalInterface.addCallback ( "myFlexFunction",myFunc);
}

Then in the Html page, first get the reference to the SWF object, that is, the Id attribute of the Swf declared with For example, it is MyFlexApp. Then you can call methods in Flex in the following way.

< ;button onclick="callApp()">Call App

2. Call JavaScript in Flex
You can call JavaScript in the Html page. By interacting with JavaScript, you can change the Style and call remote method. You can also pass the data to the Html page, and then return it to Flex after processing. There are two main methods to complete such a function: ExternalInterface() and navigateToUrl().
The easiest way to call JavaScript in Flex is to use ExternalInterface(). You can use this API to call any JavaScript, pass parameters, and get the return value. If the call fails, Flex throws an exception.
ExternalInterface encapsulates checking of browser support, which can be viewed using the available attribute.
ExternalInterface is very simple to use, the syntax is as follows:
flash.external.ExternalInterface.call(function_name: String[, arg1, ...]):Object;
The parameter function_name is the name of the JavaScript function to be called, and the following parameters are Parameters required by JavaScript.
An example of how to call a JavaScript function
In the Flex application, add the following method:


< mx: Application var f:String = "changeDocumentTitle"; var m:String = ExternalInterface.call(f,"New Title");
trace(m); ="Change Document Title" click="callWrapper()"/>

Html page has the following function definition:

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Replace String Characters in JavaScript Replace String Characters in JavaScript Mar 11, 2025 am 12:07 AM

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

jQuery Check if Date is Valid jQuery Check if Date is Valid Mar 01, 2025 am 08:51 AM

Simple JavaScript functions are used to check if a date is valid. function isValidDate(s) { var bits = s.split('/'); var d = new Date(bits[2] '/' bits[1] '/' bits[0]); return !!(d && (d.getMonth() 1) == bits[1] && d.getDate() == Number(bits[0])); } //test var

jQuery get element padding/margin jQuery get element padding/margin Mar 01, 2025 am 08:53 AM

This article discusses how to use jQuery to obtain and set the inner margin and margin values ​​of DOM elements, especially the specific locations of the outer margin and inner margins of the element. While it is possible to set the inner and outer margins of an element using CSS, getting accurate values ​​can be tricky. // set up $("div.header").css("margin","10px"); $("div.header").css("padding","10px"); You might think this code is

10 jQuery Accordions Tabs 10 jQuery Accordions Tabs Mar 01, 2025 am 01:34 AM

This article explores ten exceptional jQuery tabs and accordions. The key difference between tabs and accordions lies in how their content panels are displayed and hidden. Let's delve into these ten examples. Related articles: 10 jQuery Tab Plugins

10 Worth Checking Out jQuery Plugins 10 Worth Checking Out jQuery Plugins Mar 01, 2025 am 01:29 AM

Discover ten exceptional jQuery plugins to elevate your website's dynamism and visual appeal! This curated collection offers diverse functionalities, from image animation to interactive galleries. Let's explore these powerful tools: Related Posts: 1

HTTP Debugging with Node and http-console HTTP Debugging with Node and http-console Mar 01, 2025 am 01:37 AM

http-console is a Node module that gives you a command-line interface for executing HTTP commands. It’s great for debugging and seeing exactly what is going on with your HTTP requests, regardless of whether they’re made against a web server, web serv

Custom Google Search API Setup Tutorial Custom Google Search API Setup Tutorial Mar 04, 2025 am 01:06 AM

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

jquery add scrollbar to div jquery add scrollbar to div Mar 01, 2025 am 01:30 AM

The following jQuery code snippet can be used to add scrollbars when the div content exceeds the container element area. (No demonstration, please copy it directly to Firebug) //D = document //W = window //$ = jQuery var contentArea = $(this), wintop = contentArea.scrollTop(), docheight = $(D).height(), winheight = $(W).height(), divheight = $('#c

See all articles