javascript的bind()函数使用

jfk403

于 2014-12-04 16:16:18 发布

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分类专栏： javascript 文章标签： javascript ViewUI

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// Define the original function.
var checkNumericRange = function (value) {
    if (typeof value !== 'number')
        return false;
    else
        return value >= this.minimum && value <= this.maximum;
}

// The range object will become the this value in the callback function.
var range = { minimum: 10, maximum: 20 };

// Bind the checkNumericRange function.
var boundCheckNumericRange = checkNumericRange.bind(range);

// Use the new function to check whether 12 is in the numeric range.
var result = boundCheckNumericRange (12);
document.write(result);

// Output: true