jquery - jQuery hasAttr检查元素是否有属性[重复](jQuery hasAttr checking to see if there is an attribute on an element [duplicate])

Question

Possible Duplicate:

(可能重复：)
Check existence of an attribute with JQuery

(使用JQuery检查属性是否存在)

How do you check if there is an attribute on an element in jQuery?

(你如何检查jQuery中的元素是否有属性？)

Similar to hasClass , but with attr ?

(与hasClass类似，但是attr ？)

For example,

(例如，)

if ($(this).hasAttr("name")) {
    // ...
}

  ask by Mark translate from so

Answer 1

var attr = $(this).attr('name');

// For some browsers, `attr` is undefined; for others,
// `attr` is false.  Check for both.
if (typeof attr !== typeof undefined && attr !== false) {
    // ...
}