CFScript: Difference between revisions

Revision as of 00:50, 14 March 2020

Revision as of 17:29, 11 May 2020

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Unless it's within a pure script-based ColdFusion Component, all CFScript code must be contained within a CFScript tag pair as follows:

<sourcesyntaxhighlight lang="cfm">

<cfscript>

xParam = 115;

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color = 'FFCC99';

</cfscript>

</syntaxhighlight>

</source>

A simple example of a [[Subroutine|function]]:

<sourcesyntaxhighlight lang="cfm">

<cfscript>

function Sum(a, b) {

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}

</cfscript>

</syntaxhighlight>

</source>

A simple example of a component in CFScript, containing two functions:

<sourcesyntaxhighlight lang="javascript">

component {

public void function foo() {

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}

}

</syntaxhighlight>

</source>

ColdFusion 11, [[Railo]] 4.1+, and [[Lucee]] 4.5+ both do their best to fully support cf tags in CFScript.

While there may not be direct substitutions for all tags, it is often still possible to achieve the results of a tag in script, but via a different syntax. For example, this is how to get a query into a variable in CFSCRIPT without writing a [[User-defined function|UDF]]:

<sourcesyntaxhighlight lang="cfm">

<cfscript>

qGetData = new Query();

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qDateResult = qGetData .Execute().getResult();

</cfscript>

</syntaxhighlight>

</source>

== Syntax ==

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=== Comments ===

CFScript has two forms of comments: single line and multiline.

<sourcesyntaxhighlight lang="javascript">

// This is a single-line comment.

// This is a second single-line comment.

</syntaxhighlight>

</source>

<sourcesyntaxhighlight lang="javascript">

/* This is a multiline comment.

You do not need to start each line with a comment indicator.

This line is the last line in the comment. */

</syntaxhighlight>

</source>

=== Try / Catch ===

<sourcesyntaxhighlight lang="javascript">

try {

throw(message="Oops", detail="xyz");

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WriteOutput("I run even if no error");

}

</syntaxhighlight>

</source>

=== Switch statement ===

<sourcesyntaxhighlight lang="javascript">

switch (car) {

case "Nissan":

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WriteOutput("I'm exotic");

}

</syntaxhighlight>

</source>

=== Looping ===

==== For Loop ====

<sourcesyntaxhighlight lang="javascript">

for (i=1; i LTE ArrayLen(array); i=i+1) {

WriteOutput(array[i]);

}

</syntaxhighlight>

</source>

==== FOR IN Loop ====

<sourcesyntaxhighlight lang="javascript">

struct = StructNew();

struct.one = "1";

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}

//OUTPUTS onetwo

</syntaxhighlight>

</source>

==== While Loop ====

<sourcesyntaxhighlight lang="javascript">

x = 0;

while (x LT 5) {

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}

// Outputs: 12345

</syntaxhighlight>

</source>

==== Do / While Loop ====

<sourcesyntaxhighlight lang="javascript">

x = 0;

do {

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} while (x LTE 0);

// Outputs: 1

</syntaxhighlight>

</source>

==== Looping over an Array ====

<sourcesyntaxhighlight lang="javascript">

for (item in array) {

doSomething(item);

}

</syntaxhighlight>

</source>

== Differences from JavaScript ==