email_detector.js

const email_detector_ruleset = ruleset([
        // Inputs that could be email fields:
        rule(dom("input[type=text],input[type=\"\"],input:not([type])").when(isVisible), type("email")),

        // Look for exact matches of "email"-like keywords in some attributes of the <input>
        rule(
            type("email"),
            score(fnode => attrsMatch(fnode.element, ["id", "name", "autocomplete"], emailRegexMatchLine)),
            {name: "inputAttrsMatchEmailExactly"}
        ),

        // Count matches of "email"-like keywords in some attributes of the <input>
        rule(
            type("email"),
            score(fnode => attrsMatch(fnode.element, ["placeholder", "aria-label"], emailRegex)),
            {name: "inputPlaceholderMatchesEmail"}
        ),

        // If there's a corresponding <label> for this input, count its inner text matches for "email"-like keywords
        rule(
            type("email"),
            score(fnode => labelForInputMatches(fnode.element, emailRegex)),
            {name: "labelForInputMatchesEmail"}
        ),

        rule(type("email"), out("email")),
    ],
    new Map([
        ["inputAttrsMatchEmailExactly", 9.416913986206055],
        ["inputPlaceholderMatchesEmail", 6.740292072296143],
        ["labelForInputMatchesEmail", 10.197700500488281],
    ]),
    [["email", -3.907843589782715]]
);