HTMX 2.0.3 fails with a syntax error on htmx.js line 1467

[mzeijen]

I tried upgrading to HTMX 2.0.3, using HTMLUnit 4.5.0 and I hit the following error:

Exception class=[org.htmlunit.corejs.javascript.EvaluatorException]
org.htmlunit.ScriptException: syntax error (http://localhost:59068/internal/assets/webjars/htmx.org/2.0.3/dist/htmx.js#1467)
	at org.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:903)
	at org.htmlunit.corejs.javascript.Context.call(Context.java:590)
	at org.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:487)
	at org.htmlunit.javascript.HtmlUnitContextFactory.callSecured(HtmlUnitContextFactory.java:316)
	at org.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:734)
	at org.htmlunit.javascript.JavaScriptEngine.compile(JavaScriptEngine.java:109)
	at org.htmlunit.html.HtmlPage.loadJavaScriptFromUrl(HtmlPage.java:1124)
        ...

It seems to have an issue with the following line:

for (const preservedElt of [...pantry.children]) {

I can confirm that HTMX 2.0.2 does not have this issue and HTMLUnit 4.5.0 works fine with it.

[rbri]

Yes that is a new problem because 2.0.3 uses the spread syntax at one place

line 1464

function restorePreservedElements() {
    const pantry = find('#--htmx-preserve-pantry--')
    if (pantry) {
        for (const preservedElt of [...pantry.children]) {
            const existingElement = find('#' + preservedElt.id)
            // @ts-ignore - use proposed moveBefore feature
            existingElement.parentNode.moveBefore(preservedElt, existingElement)
            existingElement.remove()
        }
        pantry.remove()
    }
}