JavaScript中的property和attribute
发表评论»首先看看这两个单词的英文释义(来自有道词典)。先是property:
property ['prɔpəti]
n. 性质,性能;财产;所有权
英英释义:
- any area set aside for a particular purpose “the president was concerned about the property across from the White House”
同义词:place- something owned; any tangible or intangible possession that is owned by someone “that hat is my property”; ” he is a man of property”
同义词:belongings | holding | material possession- a basic or essential attribute shared by all members of a class
- a construct whereby objects or individuals can be distinguished “self-confidence is not an endearing property”
同义词:attribute | dimension- any movable articles or objects used on the set of a play or movie
同义词:prop
重点看2、3、4条。
再看attribute:
attribute [ə'tribju:t, 'ætribju:t]
n. 属性;特质
vt. 归属;把…归于英英释义:
n.
- a construct whereby objects or individuals can be distinguished
同义词:property | dimension- an abstraction belonging to or characteristic of an entity
v.
property,attribute都作“属性”解,但是attribute更强调区别于其他事物的特质/特性,而在这篇文章中也提交到attribute是property的子集。
而在JavaScript中,property和attribute更是有明显的区别。众所周知,setAttribute是为DOM节点设置/添加属性的标准方法:
var ele = document.getElementById("my_ele");
ele.setAttribute("title","it's my element");
但很多时候我们也这样写:
ele.title = "it's my element";
如果不出什么意外,他们都运行的很好,它们似乎毫无区别?而且通常情况下我们还想获取到我们设置的“属性”,我们也很爱这样写:
alert(ele.title);
这时候,你便会遇到问题,如果你所设置的属性属于DOM元素本身所具有的标准属性,不管是通过ele.setAttribute还是ele.title的方式设置,都能正常获取。但是如果设置的属性不是标准属性,而是自定义属性呢?
