javascript - 如何让这个 JavaScript 脚本工作？

Question

我对 JavaScript 和编码还很陌生。我想知道是否有人可以将 jsfiddle 中的随机名称生成器放在一个工作文件中？我只是不知道如何让它运行，我是否必须导入一些库或其他东西？我有一种感觉，如果我能做到这一点，我可能会以某种方式学到一些东西。

这是我得到代码的地方: https://jsfiddle.net/katowulf/3gtDf/

脚本如下:

$('button').click(function() {
    $('h2').text(randomEl(adjectives)+' '+randomEl(nouns));
    selectElementContents($('h2')[0]);
});

function randomEl(list) {
    var i = Math.floor(Math.random() *   . list.length);
    return list[i];
}

function selectElementContents(el) {
    var range = document.createRange();
    range.selectNodeContents(el);
    var sel = window.getSelection();
    sel.removeAllRanges();
    sel.addRange(range);
}

var adjectives = ["adamant", "adroit", "amatory", "animistic", "antic", "arcadian", "baleful", "bellicose", "bilious", "boorish", "calamitous", "caustic", "cerulean", "comely", "concomitant", "contumacious", "corpulent", "crapulous", "defamatory", "didactic", "dilatory", "dowdy", "efficacious", "effulgent", "egregious", "endemic", "equanimous", "execrable", "fastidious", "feckless", "fecund", "friable", "fulsome", "garrulous", "guileless", "gustatory", "heuristic", "histrionic", "hubristic", "incendiary", "insidious", "insolent", "intransigent", "inveterate", "invidious", "irksome", "jejune", "jocular", "judicious", "lachrymose", "limpid", "loquacious", "luminous", "mannered", "mendacious", "meretricious", "minatory", "mordant", "munificent", "nefarious", "noxious", "obtuse", "parsimonious", "pendulous", "pernicious", "pervasive", "petulant", "platitudinous", "precipitate", "propitious", "puckish", "querulous", "quiescent", "rebarbative", "recalcitant", "redolent", "rhadamanthine", "risible", "ruminative", "sagacious", "salubrious", "sartorial", "sclerotic", "serpentine", "spasmodic", "strident", "taciturn", "tenacious", "tremulous", "trenchant", "turbulent", "turgid", "ubiquitous", "uxorious", "verdant", "voluble", "voracious", "wheedling", "withering", "zealous"];
var nouns = ["ninja", "chair", "pancake", "statue", "unicorn", "rainbows", "laser", "senor", "bunny", "captain", "nibblets", "cupcake", "carrot", "gnomes", "glitter", "potato", "salad", "toejam", "curtains", "beets", "toilet", "exorcism", "stick figures", "mermaid eggs", "sea barnacles", "dragons", "jellybeans", "snakes", "dolls", "bushes", "cookies", "apples", "ice cream", "ukulele", "kazoo", "banjo", "opera singer", "circus", "trampoline", "carousel", "carnival", "locomotive", "hot air balloon", "praying mantis", "animator", "artisan", "artist", "colorist", "inker", "coppersmith", "director", "designer", "flatter", "stylist", "leadman", "limner", "make-up artist", "model", "musician", "penciller", "producer", "scenographer", "set decorator", "silversmith", "teacher", "auto mechanic", "beader", "bobbin boy", "clerk of the chapel", "filling station attendant", "foreman", "maintenance engineering", "mechanic", "miller", "moldmaker", "panel beater", "patternmaker", "plant operator", "plumber", "sawfiler", "shop foreman", "soaper", "stationary engineer", "wheelwright", "woodworkers"];

$('button').click();

和 html:

<button>new name</button>
    <h2></h2>

Answer 1

您需要 jQuery，因为您使用它来选择元素，并且您需要确保代码首次运行时 DOM 已准备好，因为它将查找 h2 元素。

此外，您在这行中有一个拼写错误:

var i = Math.floor(Math.random() *   . list.length);                                   
               (that extra dot)     ^^^

让我们修复它并在这里尝试一下:

$('button').click(function() {
    $('h2').text(randomEl(adjectives)+' '+randomEl(nouns));
    selectElementContents($('h2')[0]);
});

function randomEl(list) {
    var i = Math.floor(Math.random() * list.length);
    return list[i];
}

function selectElementContents(el) {
    var range = document.createRange();
    range.selectNodeContents(el);
    var sel = window.getSelection();
    sel.removeAllRanges();
    sel.addRange(range);
}

var adjectives = ["adamant", "adroit", "amatory", "animistic", "antic", "arcadian", "baleful", "bellicose", "bilious", "boorish", "calamitous", "caustic", "cerulean", "comely", "concomitant", "contumacious", "corpulent", "crapulous", "defamatory", "didactic", "dilatory", "dowdy", "efficacious", "effulgent", "egregious", "endemic", "equanimous", "execrable", "fastidious", "feckless", "fecund", "friable", "fulsome", "garrulous", "guileless", "gustatory", "heuristic", "histrionic", "hubristic", "incendiary", "insidious", "insolent", "intransigent", "inveterate", "invidious", "irksome", "jejune", "jocular", "judicious", "lachrymose", "limpid", "loquacious", "luminous", "mannered", "mendacious", "meretricious", "minatory", "mordant", "munificent", "nefarious", "noxious", "obtuse", "parsimonious", "pendulous", "pernicious", "pervasive", "petulant", "platitudinous", "precipitate", "propitious", "puckish", "querulous", "quiescent", "rebarbative", "recalcitant", "redolent", "rhadamanthine", "risible", "ruminative", "sagacious", "salubrious", "sartorial", "sclerotic", "serpentine", "spasmodic", "strident", "taciturn", "tenacious", "tremulous", "trenchant", "turbulent", "turgid", "ubiquitous", "uxorious", "verdant", "voluble", "voracious", "wheedling", "withering", "zealous"];
var nouns = ["ninja", "chair", "pancake", "statue", "unicorn", "rainbows", "laser", "senor", "bunny", "captain", "nibblets", "cupcake", "carrot", "gnomes", "glitter", "potato", "salad", "toejam", "curtains", "beets", "toilet", "exorcism", "stick figures", "mermaid eggs", "sea barnacles", "dragons", "jellybeans", "snakes", "dolls", "bushes", "cookies", "apples", "ice cream", "ukulele", "kazoo", "banjo", "opera singer", "circus", "trampoline", "carousel", "carnival", "locomotive", "hot air balloon", "praying mantis", "animator", "artisan", "artist", "colorist", "inker", "coppersmith", "director", "designer", "flatter", "stylist", "leadman", "limner", "make-up artist", "model", "musician", "penciller", "producer", "scenographer", "set decorator", "silversmith", "teacher", "auto mechanic", "beader", "bobbin boy", "clerk of the chapel", "filling station attendant", "foreman", "maintenance engineering", "mechanic", "miller", "moldmaker", "panel beater", "patternmaker", "plant operator", "plumber", "sawfiler", "shop foreman", "soaper", "stationary engineer", "wheelwright", "woodworkers"];

$('button').click();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button>new name</button>
<h2></h2>

一切都好。