考虑这个代码示例:
HTML
<div class="number_group">
<span class="min">0</span> -
<span class="max">5</span>:
<span class="value">10</span>
</div>
<div class="number_group">
<span class="min">6</span> -
<span class="max">10</span>:
<span class="value">16</span>
</div>
<div class="number_group">
<span class="min">11</span> -
<span class="max">15</span>;
<span class="value">20</span>
</div>
<div class="number_group">
<span class="min">16</span> -
<span class="max">20</span>;
<span class="value">22</span>
</div>
<label>
<input type="number" id="input_val" min="0" max="20" />
<button id="check" type="button">Check</button>
</label>
我想用 jquery 实现的是,在用户在 $('input#input_val') 中输入数字并点击 $('button#check') 之后函数返回给定范围内的值。
例如,如果用户输入数字3,函数将返回“10”;
例如,如果用户输入数字 8,函数将返回“16”等
列表应该是动态的,这意味着我们不知道给定了多少 $('div.number_group')。
最佳答案
遍历 .number_group
并根据最小值和最大值找出值。
$('#check').click(function() {
var res,
// get the entered value
num = +$('#input_val').val();
// iterate over the divs
$('.number_group').each(function() {
// check the value within min and max
if (num >= +$('.min', this).text() && num <= +$('.max', this).text()) {
// if within range set the result as its value
res = +$('.value', this).text();
// break the loop by returning false, since we are findout our value
return false;
}
})
console.log(res);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="number_group">
<span class="min">0</span> -
<span class="max">5</span>:
<span class="value">10</span>
</div>
<div class="number_group">
<span class="min">6</span> -
<span class="max">10</span>:
<span class="value">16</span>
</div>
<div class="number_group">
<span class="min">11</span> -
<span class="max">15</span>;
<span class="value">20</span>
</div>
<div class="number_group">
<span class="min">16</span> -
<span class="max">20</span>;
<span class="value">22</span>
</div>
<label>
<input type="number" id="input_val" min="0" max="20" />
<button id="check" type="button">Check</button>
</label>
关于javascript - Jquery 从一个范围获取一个值,从其他范围获取第二个值,从其他范围获取第三个值等,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38394104/