Selectors are used to do exactly what their name implies: select content within a Web page.
They use a very CSS-like syntax in order to do this. To take a few examples:
$("tag"): Select all of the <tag> elements$(".className"): Select all elements that have the className class applied$("#identifier"): Select the element with the id of identifier$("tag.className"): Select all <tag> elements that have the className class applied
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