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23 Cards in this Set
- Front
- Back
What is the confirm() method
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* Similar to Alert()
* Returns either True or False |
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What is the prompt() Method
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* Requests user input throught a text field within a dialog box.
* Window Object |
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What is the alert() Method
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* Simple JavaScript method that allows you to communicate with the users.
* Window Object |
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What is the document.write() method
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* Belongs to the document ojbect and allows you to create text that is dynamically written to the windows as the script is executed.
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What is a Variable
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* Named space of memory.
* Container that holds a value. * Five data types: number, string, Boolean,null and Object. |
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What is JavaScript expression
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* Part of a statement that is evaluated as a value.
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What are the types of expressions?
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* Assignment
* Arithmetic * String * Logical |
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What is Operand?
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Data that is to be operated upon or manipulated in some manner.
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What is a Statement?
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A single line of code to be executed in a script or program.
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What is Concatenation?
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Synthesis of code to simplify it and reduce duplication; linking two or more units of information such as strings or file, to form one unit.
exp. alert("Begin message " + prompt("Message to user", "default text") + " End message."); |
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What is an Event Handler?
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A JavaScript mechanism for intercepting an event and associating exectable code with that event.
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What is Dot Notation?
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A reference used to access a property or method of an object.
exp. objectName.methodName(); objectName.propertyName; |
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What is the Assignment Expression?
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Assigns a value to a variable.
Exp. myNumber = 25; The value 25 has been assigned to the varible nyNumber. Operator is = (assignment). |
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What is the Arithmetic Expression?
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Evaluates to a number.
Exp. 25 + 75; This expression evaluates to the sum of 25 and 75. Operator is + (addition). |
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What is the String Expression?
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Evaluates to a string.
Exp. "Hello, " + "Sandy"; This evaluates to a new string that says "Hello, Sandy". Operator is + (concatenation). |
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What is the Logical Expression?
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Evaluates to true or false.
exp. 25 > 75; Becuase 25 is less than 75, this expression evaluates to the Boolean value of true. Operator is < (less than comparison). |
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What is Operand?
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Data that is to be operated upon or manipulated in some manner.
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What is a Statement?
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A single line of code to be executed in a script or program.
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What is Concatenation?
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Synthesis of code to simplify it and reduce duplication; linking two or more units of information such as strings or file, to form one unit.
exp. alert("Begin message " + prompt("Message to user", "default text") + " End message."); |
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What is an Event Handler?
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A JavaScript mechanism for intercepting an event and associating exectable code with that event.
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What is Dot Notation?
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A reference used to access a property or method of an object.
exp. objectName.methodName(); objectName.propertyName; |
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What is a Function?
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A named block of code that can be called when needed. Can return a value.
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What is a argument?
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A value or expression containing data or code that is passed on to a function or procedure.
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