boldsymbol¶

The boldsymbol extension defines the \boldsymbol LaTeX macro that produces a bold version of its argument, provided bold versions of the required characters are available.

This extension is loaded automatically when the autoload extension is used. To load the boldsymbol extension explicitly (when using input/tex-base for example), add '[tex]/boldsymbol' to the load array of the loader block of your MathJax configuration, and add 'boldsymbol' to the packages array of the tex block.

window.MathJax = {

Alternatively, use \require{boldsymbol} in a TeX expression to load it dynamically from within the math on the page, if the require extension is loaded.