C777 Unit 3: JavaScript copy

toUpperCase()

Which method convert a string value to uppercase letters?

abort

Which event occurs when the loading of an image is terminated?

blur

Which event occurs when a user clicks the mouse button outside of a particular input field?

click

Which event occurs when the user clicks on a link or form element?

change

Which event occurs when a user modifies the value of a form field?

error

Which event occurs when there is a problem loading an external image or resource?

focus

Which event occurs when a user clicks into a form field?

load

Which event occurs when a page is opened?

mouseOver

Which event occurs when the user moves the mouse pointer over a link, image or other visible element on a page?

mouseOut

Which event occurs when the mouse pointer leaves a link, image or other visible element on a page?

reset

Which event occurs when a form's Reset button is clicked?

select

Which event occurs when the user highlights the text in a form field?

submit

Which event occurs when a form's Submit button is clicked?

unload

Which event occurs when a page closed?

properties

What are attributes of an object, such as height, color, font size, sentence length and so forth?

methods

What are actions that an object can be made to perform?

alert()

Which method creates a pop-up box with the specified message string, which the user can dismiss by clicking a button in the box?

prompt()

Which method creates a pop-up box with the specified message string and requests user input into a text field in the box?

confirm()

Which method creates a pop-up box with the specified message string and requests user confirmation by clicking the OK or Cancel button in the box?

document.write()

Which method writes the specified message string in the page?

variable

What is a named space of memory?

=

Which operator is used to assign values?

number

Which data type holds any numeric value used for mathematical operations?

string

Which data type holds any string of alphanumeric characters used for words or for numbered phrases that are not mathematically manipulated?

var birthYear = "1956"

Which expression creates a string value?

var birthYear = 1956

Which expression creates an integer value?

Boolean

Which data type holds True or False values only?

null

Which value indicates that a user enters nothing in a text box then submits the form?

undefined

Which value indicates that a variable has no value assigned yet?

expression

What is a part of a statement that is evaluated as a value?

operator

What is a symbol or character used in expressions to store or evaluate a value?

Assignment

Which type of operator assigns a value to a variable using the equal symbol?

Example: myNumber = 25

Arithmetic

Which type of operator evaluates to a number?

Example: 25 + 75

Logical

Which type of operator will evaluate to true or false?

Example: 25 < 75

Comparison

Which type of operator compares two values and returns a true or false value?

Example: z == 10

Conditional

Which type of operator makes decisions in a script?

Example: (a > b) ? a++ : a--

concatenation

What process combines text strings using the plus sign?

Example: "hello" + "world"

function

What is a named set of statements that performs a task or calculates a value?

function myFunction(){}

How do you declare a function?

calling statement

What processes a function's statements?

nothing

What happens if you define a function but do not call it?

myFunction()

How do you call this function?

function myFunction(){

return "success";

}

return

What is used to output values from a function?

local variable

What type of variable is declared within a function and available only from within that function?

global variable

What type of variable is available throughout the entire script?

argument

What is a value or expression containing data or code that is passed on to a function?

pass by reference

What describes when values are passed to a function, and the function's parameters receive a copy of its argument's value?

Example:

function myFunction(x){

return x;

}

var num = 2;

myFunction(num);

pass by value

What describes when values are passed to a function, and the function's parameters receive its argument's actual value?

Example:

function myFunction(x){

return x;

}

myFunction(2);

isNaN()

Which method determines whether an value is a number?

parseInt()

Which method converts a string to its integer equivalent?

parseFloat()

Which method converts a string to its floating-point decimal equivalent?

Load-time errors

Which errors are typically syntax errors and usually cause error alerts?

Run-time errors

Which errors occur after the script has loaded and is running, typically caused by improper use of commands?

Logic errors

Which errors are mathematical , casting errors, errors in proper command usage or errors in the structure of the script, which result in the script running improperly?

literal

What is the actual data values you provide in JavaScript?

object

What is a self-contained programming component that contains properties and methods?

dot notation

What is a reference technique used to access a property or method of an object?

an object-based language

based upon an event-driven model

is platform-independent

enables quick development

is relatively easy to learn

What are key characteristics and features of JavaScript?

client side

Does JavaScript perform its functionality primarily on the client or server-side?

embedded scripting

Which technique adds JavaScript to a single web page within either the <head> or <body>?

inline scripting

Which technique adds JavaScript to a single HTML element?

external scripting

Which technique adds JavaScript by linking web pages to a text file with the .js file name extension?

<a href="#" onMouseOver="helloFunction();">Click Here</a>

How do you apply inline scripting to an element?

a letter,

the underscore ( _ ), or

the dollar sign ( $ )

What must variable names begin with?

unique

Is these variables the same or unique?

var Result

var result

var RESULT

navigator

Which object allows you to determine information about the user's browser?

navigator.appName

Which property returns a string value indicating the name of the client browser?

navigator.appVersion

Which property returns a string value indicating the version number of the client browser, as well as the client's platform?

0

What is the value of myVar after execution?

function counter(x) {

return x + 1;

}

var myVar = 0;

counter(myVar);

alert(myVar);

The total is 1.03

What will the alert box display?

var subTotal = 1;

var tax = 0.03;

alert("The total is " + subTotal * (1 + tax));