如果li少于3个字符，请隐藏？

Question

I want to be able to hide list items that have less than 3 characters, how do I do this? What is wrong with my code below?

I am a JavaScript/jQuery newbie.

jQuery().ready(function () {
    if (jQuery('ol li').length < 3) {
        jQuery(this).hide();
    };
});

Answer 1

Your code is saying

if (jQuery('ol li').length < 3) {  //If I have less than 3 li elements
    jQuery(this).hide();   //hide the window object
};

What you want to use is filter

$('ol li').filter( function(){ return $(this).text().length<3; } ).hide();

EDIT - Based on your comment in my post: If it is a span tag that could have other data around it:

$('ol li span').filter( function(){ return $(this).text().length<3; } ).parent().hide()

Fiddle running the span example

Answer 2

You'll need to filter out the elements that have a content of less than 3 characters, and hide those :

$(function() {
    $('ol li').filter(function() {
        return $(this).text().length < 3 ;
    }).hide();
});

Answer 3

$('ul li').each(function() {
    if ($(this).text().length < 3)
        $(this).hide();
});

Demo

Answer 4

Try this:

$('ol li').filter(function(){ return $(this).text().length < 3; }).hide();

Another alternative could be this:

(Because you are evaluating elements not value characters in your question code snippet)

if($('ol li').length < 3){ $(this).hide(); };

Answer 5

我认为你需要得到你的DOM元素的.html() ，然后做.length 。