JavaScript Assignment
JavaScript Assignment Operators Assignment operators assign values to JavaScript variables. Operator Example Same As = x = y x = y += x += y x = x + y -= x -= y x = x – y *= x *= y x = x * y /= x /= y x = x […]
Tag: Tutorial
JavaScript Arithmetic
JavaScript Arithmetic Operators Arithmetic operators perform arithmetic on numbers (literals or variables). Operator Description + Addition – Subtraction * Multiplication / Division % Modulus (Remainder) ++ Increment — Decrement Arithmetic Operations A typical arithmetic operation operates on two numbers. The two numbers can be literals: Example var x = 100 + 50; Try it Yourself » or variables: Example […]
JavaScript Operators
Example Assign values to variables and add them together: var x = 5; // assign the value 5 to x var y = 2; // assign the value 2 to y var z = x + y; // assign the value 7 to z (x + y) Try it Yourself » The assignment operator (=) assigns a value to a variable. Assignment var x = 10; Try […]
JavaScript Variables
JavaScript variables are containers for storing data values. In this example, x, y, and z, are variables: Example var x = 5; var y = 6; var z = x + y; Try it Yourself » From the example above, you can expect: x stores the value 5 y stores the value 6 z stores the value 11 Much Like […]
JavaScript Comments
JavaScript comments can be used to explain JavaScript code, and to make it more readable. JavaScript comments can also be used to prevent execution, when testing alternative code. Single Line Comments Single line comments start with //. Any text between // and the end of the line will be ignored by JavaScript (will not be […]
JavaScript Syntax
JavaScript syntax is the set of rules, how JavaScript programs are constructed: var x, y; // How to declare variables x = 5; y = 6; // How to assign values z = x + y; // How to compute values JavaScript Values The JavaScript syntax defines two types of values: Fixed values and variable values. Fixed values are called literals. Variable values […]
JavaScript Statements
Example var x, y, z; // Statement 1 x = 5; // Statement 2 y = 6; // Statement 3 z = x + y; // Statement 4 Try it Yourself » JavaScript Programs A computer program is a list of “instructions” to be “executed” by a computer. In a programming language, these programming instructions are called statements. A JavaScript program is a list of programming statements. In […]
JavaScript Output
JavaScript Display Possibilities JavaScript can “display” data in different ways: Writing into an HTML element, using innerHTML. Writing into the HTML output using document.write(). Writing into an alert box, using window.alert(). Writing into the browser console, using console.log(). Using innerHTML To access an HTML element, JavaScript can use the document.getElementById(id) method. The id attribute defines the HTML element. The innerHTML property defines the HTML content: […]
JavaScript Where To
The <script> Tag In HTML, JavaScript code must be inserted between <script> and </script> tags. Example <script> document.getElementById(“demo”).innerHTML = “My First JavaScript”; </script> Try it Yourself » Old JavaScript examples may use a type attribute: <script type=”text/javascript”>. The type attribute is not required. JavaScript is the default scripting language in HTML. JavaScript Functions and Events A JavaScript function is […]
JavaScript Introduction
This page contains some examples of what JavaScript can do. JavaScript Can Change HTML Content One of many JavaScript HTML methods is getElementById(). This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”: document.getElementById(“demo”).innerHTML = “Hello JavaScript”; Try it Yourself » JavaScript accepts both double and single […]
HTML Images
Images can improve the design and the appearance of a web page. HTML Images Syntax In HTML, images are defined with the <img> tag. The <img> tag is empty, it contains attributes only, and does not have a closing tag. The src attribute specifies the URL (web address) of the image: <img src=”url“> The alt Attribute The alt attribute provides an alternate text for an […]
HTML Lists
HTML List Example An Unordered List: Item Item Item Item An Ordered List: First item Second item Third item Fourth item Try it Yourself » Unordered HTML List An unordered list starts with the <ul> tag. Each list item starts with the <li> tag. The list items will be marked with bullets (small black circles) by default: Example <ul> […]
HTML Iframes
An iframe is used to display a web page within a web page. Iframe Syntax An HTML iframe is defined with the <iframe> tag: <iframe src=”URL“></iframe> The src attribute specifies the URL (web address) of the inline frame page. Iframe – Explaination Use the height and width attributes to specify the size of the iframe. The attribute values are specified in pixels by default, […]
HTML JavaScript
JavaScript makes HTML pages more dynamic and interactive. Example My First JavaScript Click me to display Date and Time Try it Yourself » The HTML <script> Tag The <script> tag is used to define a client-side script (JavaScript). The <script> element either contains scripting statements, or it points to an external script file through the src attribute. Common uses for JavaScript […]
HTML File Paths
Path Description <img src=”picture.jpg”> picture.jpg is located in the same folder as the current page <img src=”images/picture.jpg”> picture.jpg is located in the images folder in the current folder <img src=”/images/picture.jpg”> picture.jpg is located in the images folder at the root of the current web <img src=”../picture.jpg”> picture.jpg is located in the folder one level up […]
Displaying 3D models in PDFs
In Acrobat, you can view and interact with high-quality 3D content created in professional 3D CAD or 3D modeling programs and embedded in PDFs. For example, you can hide and show parts of a 3D model, remove a cover to look inside, and turn parts around as if holding them in your hands. A 3D […]
Commenting on 3D designs in PDFs
Comments added to a 3D object are associated with specific views that are defined when the comments are added. If the view is changed—for example, if the 3D object is rotated or moved—the comments are no longer visible. You have three ways to add comments to a 3D object: Using the 3D Comment Tool on the 3D […]
Setting 3D views in PDFs
The default view of a 3D model lets you quickly revert to a starting point at any time as you interact with the model. A default view is different from a preview, which determines what the 3D model looks like when it’s not activated. The list of all available views for the 3D model appears […]
Enable 3D content in PDF
The dynamic nature of 3D provides the potential for it to be subject to security vulnerabilities. Therefore, the autoplay of 3D content in PDFs is disabled by default. Enable playing of 3D content in PDF When you open a PDF with 3D content, you see a yellow bar at the top with the message – […]
Add audio, video, and interactive objects to PDFs
Include audio, video, and interactive 3D objects in your PDF files. Add files directly to your PDF or link to files on the web. Note: This document provides instructions for Acrobat DC and Acrobat 2017. If you’re using Acrobat XI, see Acrobat XI Help. Multimedia and PDFs (Acrobat Pro) Adding video, sound, and interactive content transforms […]