Method emitOpenTag

src/Parser.ts:402–439

(name: string)

    }

    private emitOpenTag(name: string) {
        this.openTagStart = this.startIndex;
        this.tagname = name;

        /*
         * The spec ignores a second <form> when one is already open.
         * Setting tagname to "" suppresses all downstream effects: attribs
         * stays null so endOpenTag is a no-op, and closeCurrentTag can't
         * match "" on the stack.
         */
        if (this.htmlMode && name === "form" && this.stack.includes("form")) {
            this.tagname = "";
            return;
        }

        const impliesClose = this.htmlMode && openImpliesClose.get(name);

        if (impliesClose) {
            while (this.stack.length > 0 && impliesClose.has(this.stack[0])) {
                this.popElement(true);
            }
        }
        if (!this.isVoidElement(name)) {
            this.stack.unshift(name);

            if (this.htmlMode) {
                if (name === "svg") {
                    this.foreignContext.unshift(ForeignContext.Svg);
                } else if (name === "math") {
                    this.foreignContext.unshift(ForeignContext.MathML);
                } else if (htmlIntegrationElements.has(name)) {
                    this.foreignContext.unshift(ForeignContext.None);
                }
            }
        }
        this.cbs.onopentagname?.(name);
        if (this.cbs.onopentag) this.attribs = {};
    }

    private endOpenTag(isImplied: boolean) {
        this.startIndex = this.openTagStart;