JS_to_avoid

Some things to avoid and defer to jQuery when writing Javascript:

document.getXYZ -> $('...')

  document.getElementById('abc') is okay, but some others are not. Might as well use $('#abc').

querySelector -> $('...')

  querySelector is not supported in IE7 - IE8, use jQuery.

string.trim -> $.trim

  '   abc   '.trim() is not supported in IE7 - IE8. Use jQuery: $.trim('    abc    ')

innerHTML -> text()

  Most of the time you are doing elm.innerHTML you really mean to do elm.innerText, but you also know that innerText doesn't work on all browsers. So just use jQuery: $('...').text()

in general terms:

don't use any dom api directly, if you are not sure, double check with mdn.