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How to retrieve the text of a DOM Text node?可能重复：如何检索DOM Text节点的文本？
In my experiments to handle DOM mutation observers I've noticed that when the target is a text node there are four fields all containing the new text of the node.
在我处理DOM变异观察者的实验中，我注意到当目标是文本节点时，有四个字段都包含节点的新文本。
data- 数据
nodeValue- 的nodeValue
textContent- 的textContent
wholeText- wholeText
Is there a "best practice" for which of these fields I should use?
对于我应该使用哪些领域，是否有“最佳实践”？
Are some just for compatibility with other browsers or older DOM standards? Does it make a difference whether I'm reading vs modifying the text? If one is best what is the purpose of the others?
有些只是为了兼容其他浏览器或旧的DOM标准吗？是否我正在阅读和修改文本会有所不同吗？如果最好的是其他人的目的是什么？
1 个解决方案
#1
28
Of all these I'd choose data: it is defined for the nodes implementing CharacterData interface (Text and Comment ones) only. Trying to access this property for the others gives undefined.
在所有这些中，我选择数据：它仅为实现CharacterData接口（文本和注释）的节点定义。尝试为其他人访问此属性会给出undefined。
nodeValue is essentially the same as data for text nodes, but is actually defined for attribute and comment nodes as well. And I usually want my programs to fail early. )
nodeValue与文本节点的数据基本相同，但实际上也是为属性和注释节点定义的。我通常希望我的程序尽早失败。 ）
textContent is, for me, something completely different, as it represents the text content of a node and its descendants. This, along with wholeText, perhaps should be used more to collect texts from more complex structures than a single text node.
对我来说，textContent是完全不同的东西，因为它代表节点及其后代的文本内容。这与整个文本一起，可能应该更多地用于从比单个文本节点更复杂的结构中收集文本。
Said all that, textContent and wholeText were defined in DOM Level 3 (= more modern).
说了这么多，textContent和wholeText都是在DOM Level 3中定义的（=更现代）。
#1
28
Of all these I'd choose data: it is defined for the nodes implementing CharacterData interface (Text and Comment ones) only. Trying to access this property for the others gives undefined.
在所有这些中，我选择数据：它仅为实现CharacterData接口（文本和注释）的节点定义。尝试为其他人访问此属性会给出undefined。
nodeValue is essentially the same as data for text nodes, but is actually defined for attribute and comment nodes as well. And I usually want my programs to fail early. )
nodeValue与文本节点的数据基本相同，但实际上也是为属性和注释节点定义的。我通常希望我的程序尽早失败。 ）
textContent is, for me, something completely different, as it represents the text content of a node and its descendants. This, along with wholeText, perhaps should be used more to collect texts from more complex structures than a single text node.
对我来说，textContent是完全不同的东西，因为它代表节点及其后代的文本内容。这与整个文本一起，可能应该更多地用于从比单个文本节点更复杂的结构中收集文本。
Said all that, textContent and wholeText were defined in DOM Level 3 (= more modern).
说了这么多，textContent和wholeText都是在DOM Level 3中定义的（=更现代）。