org.htmlunit.javascript.preprocessor

Class HtmxTwoZeroSevenScriptPreProcessor

java.lang.Object

org.htmlunit.javascript.preprocessor.HtmxTwoZeroSevenScriptPreProcessor

All Implemented Interfaces:

ScriptPreProcessor

public class HtmxTwoZeroSevenScriptPreProcessor
extends Object
implements ScriptPreProcessor

A ScriptPreProcessor implementation that applies compatibility patches to htmx 2.0.3 - 2.0.7 versions of the htmx JavaScript library.

This preprocessor rewrites certain ECMAScript syntax constructs (such as spread operator usage in array push and for-of loops over array copies) to equivalent ES5-compatible code. This is necessary because these features are not yet supported by the JavaScript engine htmlunit-corejs (Rhino).

The class can be chained with other ScriptPreProcessor instances via its constructor.

Supported patches include:

• Replacing result.push(...toArray(...)) with result.push.apply(result, toArray(...))
• Replacing result.push(...findAttributeTargets(...)) with result.push.apply(result, findAttributeTargets(...))
• Replacing for (const preservedElt of [...pantry.children]) with for (const preservedElt of Array.from(pantry.children))
• Similar replacements for minified htmx scripts (e.g., htmx.min.js)

Usage Example:

 try (WebClient webClient = new WebClient()) {
     webClient.setScriptPreProcessor(new HtmxTwoZeroSevenScriptPreProcessor());
     // use webClient as needed
 }
 

Author:

Ronald Brill

See Also:

ScriptPreProcessor

Constructor Summary

Constructors

Constructor and Description
HtmxTwoZeroSevenScriptPreProcessor() Ctor.
HtmxTwoZeroSevenScriptPreProcessor(ScriptPreProcessor nextScriptPreProcessor) Ctor.

Method Summary

Modifier and Type	Method and Description
String	preProcess(HtmlPage htmlPage, String sourceCode, String sourceName, int lineNumber, HtmlElement htmlElement) Pre process the specified source code in the context of the given page.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HtmxTwoZeroSevenScriptPreProcessor

public HtmxTwoZeroSevenScriptPreProcessor()

Ctor.

HtmxTwoZeroSevenScriptPreProcessor

public HtmxTwoZeroSevenScriptPreProcessor(ScriptPreProcessor nextScriptPreProcessor)

Ctor.

Parameters:

nextScriptPreProcessor - the next ScriptPreProcessor

Method Detail

preProcess

public String preProcess(HtmlPage htmlPage,
                         String sourceCode,
                         String sourceName,
                         int lineNumber,
                         HtmlElement htmlElement)

Pre process the specified source code in the context of the given page.

Specified by:

preProcess in interface ScriptPreProcessor

Parameters:

htmlPage - the page

sourceCode - the code to execute

sourceName - a name for the chunk of code that is going to be executed (used in error messages)

lineNumber - the line number of the source code

htmlElement - the HTML element that will act as the context

Returns:

the source code after pre processing