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Question _ javascript skills

Source: Internet
Author: User
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This article mainly introduces how to implement the trim function of a custom function that is incompatible with IE7 and IE8. it involves the skills of the trim function rewriting and regular expression matching, for more information about how to implement the trim functions in js that are incompatible with IE8, see the examples in this article. Share it with you for your reference. The specific implementation method is as follows: 

Test

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