Function toText

static/katex/katex.js:890–892

(child)

    // MathML, but polyfills for subclassing is expensive per PR 1469.
    // $FlowFixMe: Only works for ChildType = MathDomNode.
    var toText = function toText(child) {
      return child.toText();
    };

    return this.children.map(toText).join("");
  };