javascript - 你如何检查一个 JavaScript 对象是否是一个新的 DOM 元素？

Question

我有一个函数

mutationToDom: function() {
    var container = document.createElement( 'mutation' );

    container.setAttribute( 'string', 'test' );

    return container;
}

容器是<mutation string="test"></mutation>

在单元测试中调用此函数后如何检查它？

QUnit.test( 'check function mutationToDom', function( assert ) {
    var container = testBlock.mutationToDom();
    assert.ok( container === ???, 'mutation is created with correct value' );
});

---

尝试 #1

我试过 XMLSerializer()将 XML 转换为字符串

var containerString = new XMLSerializer().serializeToString(container);

但是，containerString是

"<mutation xmlns="http://www.w3.org/1999/xhtml" string="test"></mutation>"

而不是 "<mutation string="test"></mutation>"

Answer 1

如何检查 outerHTML？

var testBlock = {
  mutationToDom: function() {
    var container = document.createElement('mutation');
    container.setAttribute('string', 'test');
    return container;
  }
};

QUnit.test( 'check function mutationToDom', function( assert ) {
    var container = testBlock.mutationToDom();
    assert.ok( container.outerHTML === '<mutation string="test"></mutation>', 'mutation is created with correct value' );
});

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