HTML Tutorial 9
timed interval
A way to time JavaScript commands; instructs browsers to run the same command repeatedly at a specified interval; are applied using the setInterval() method
function
A _______________ is a collection of commands that performs an action or returns a value.
Boolean variable
Can hold only one of two values—true or false; Note that if no value is assigned to this variable, it is interpreted as having a value of false.
case sensitive
Distinguishing upper- and lowercase characters; With JavaScript you must pay attention to whether or not the letters of a JavaScript command are capitalized.
object-based language
JavaScript _______ __________ that manipulates an object by changing one or more of its properties or by applying a method that affects the object's behavior within the web page or web browser.
Math.CONSTANT
The syntax to access mathematical constants is ______________ (supported by the Math object)
Math.ceil(x)
This method rounds x up to the next highest integer. For example, _______.______(3.58) returns 4.
Web based programming
______ __________ comes in two main types: server-side programming and client-side programming.
interpreted language
_________ ______ means that the program code is executed directly without requiring an application known as a compiler to translate the code into machine language. JavaScript is an example
Parameters
__________ are treated as variables within the function
parseFloat(string)
Identify a function that extracts the first numeric value from the text string.
script
JavaScript code is attached to an HTML file using the _____ element; The __________ element can be placed anywhere within the HTML document.
object collections
Objects are organized into groups called _____.
element.innerHTML
The HTML code that is stored within a page element can be referenced using the following innerHTML property: _________.____________ where element is an object reference to an element within the web document.
defer
The _____ attribute can be applied to the script element to ensure that an object can be referenced within a JavaScript program that runs only after the page has completed loading.
async
The _____ attribute tells a browser to parse the HTML and JavaScript code together, only pausing to process the script before returning to the HTML file.
textContent
The _____ property should be used only when no markup tags are involved.
backslash
To break a text string into several lines, which means that the text string continues on the next line, the _____ character should be used.
Debugging
_____ is the process of locating and fixing a programming error.
JavaScript
_____ is the programming language for client-side programs.
Client-side
_____ programming distributes the load to prevent a server from getting overloaded with program-related requests.
text string
A(n) _____ is any group of characters enclosed within either double or single quotation marks in JavaScript
new Date("month day, year hrs:mins:secs");
Date objects are defined using this expression.
return
For a function to provide a value, it must conclude with a _____________ statement
NaN
Not a Number
breakpoints
The technique for locating the source of an error is to set up _____, which are locations where the browser will pause the program, allowing the programmer to determine the error at that position.
logical error
A _____ _____ is free from syntax and executable mistakes, but results in an incorrect result, such as the wrong name being returned from a database or an incorrect value being returned from a calculation.
run-time error
A _____ ________occurs after a script has been successfully loaded with no syntax errors and is being executed by a browser.
semicolon
A command that indicates an action for the browser to take should end with a _____.
src
A user can create an embedded script by removing the _____ attribute and placing all of the JavaScript code within the script element.
object
A video embedded on a web page is a(n) _____ and has properties such as source of the video file or the width and height of the video player.
variable
A(n) _____ is a named item in a program that stores a data value, such as a number or text string, or an object, such as a part of the web browser or browser window; the first character must be either a letter or an underscore character ( _ ).
strict mode
Developers advocate that JavaScript be run in _____ in which all lapses in syntax result in load-time or run-time errors.