JavaScript

JavaScript常用脚本

文章目录
  1. 1. 字符串函数
    1. 1.1. 是否包含
    2. 1.2. 是否相等
    3. 1.3. 是否相等(不区分大小写)
    4. 1.4. 替换所有
    5. 1.5. StartsWith
    6. 1.6. EndsWith
    7. 1.7. Remove
    8. 1.8. Trim
    9. 1.9. LTrim
    10. 1.10. RTrim
    11. 1.11. ReplaceNewLineChars
    12. 1.12. Replace
  2. 2. 获取浏览器信息
  3. 3. 获取操作系统信息

字符串函数

是否包含

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String.prototype.Contains = function (A) {
    return (this.indexOf(A) > -1);
};

是否相等

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String.prototype.Equals = function () {
    var A = arguments;
    if (A.length == 1 && A[0].pop)
        A = A[0];
    for (var i = 0; i < A.length; i++) {
        if (this == A[i])
            return true;
    };
    return false;
};

是否相等(不区分大小写)

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String.prototype.IEquals = function () {
    var A = this.toUpperCase();
    var B = arguments;
    if (B.length == 1 && B[0].pop)
        B = B[0];
    for (var i = 0; i < B.length; i++) {
        if (A == B[i].toUpperCase())
            return true;
    };
    return false;
};

替换所有

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String.prototype.ReplaceAll = function (A, B) {
    var C = this;
    for (var i = 0; i < A.length; i++) {
        C = C.replace(A[i], B[i]);
    };
    return C;
}; 
或
String.prototype.ReplaceAll = function(A,B){
       var C = this;
       C=C.replace(/A/g,B);
       return C;  
}

StartsWith

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String.prototype.StartsWith = function (A) {
    return (this.substr(0, A.length) == A);
};

EndsWith

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String.prototype.EndsWith = function (A, B) {
    var C = this.length;
    var D = A.length;
    if (D > C)
        return false;
    if (B) {
        var E = new RegExp(A + '$', 'i');
        return E.test(this);
    } else
        return (D == 0 || this.substr(C - D, D) == A);
};

Remove

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String.prototype.Remove = function (A, B) {
    var s = '';
    if (A > 0)
        s = this.substring(0, A);
    if (A + B < this.length)
        s += this.substring(A + B, this.length);
    return s;
};

Trim

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String.prototype.Trim = function () {
    return this.replace(/(^[ \t\n\r]*)|([ \t\n\r]*$)/g, '');
};

LTrim

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String.prototype.LTrim = function () {
    return this.replace(/^[ \t\n\r]*/g, '');
};

RTrim

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String.prototype.RTrim = function () {
    return this.replace(/[ \t\n\r]*$/g, '');
}

ReplaceNewLineChars

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String.prototype.ReplaceNewLineChars = function (A) {
    return this.replace(/\n/g, A);
};

Replace

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String.prototype.Replace = function (A, B, C) {
    if (typeof B == 'function') {
        return this.replace(A, function () {
            return B.apply(C || this, arguments);
        });
    } else
        return this.replace(A, B);
};

获取浏览器信息

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var gecko = /gecko\/\d/i.test(navigator.userAgent);
var ie = /MSIE \d/.test(navigator.userAgent);
var ie_lt8 = ie && (document.documentMode == null || document.documentMode < 8);
var ie_lt9 = ie && (document.documentMode == null || document.documentMode < 9);
var webkit = /WebKit\//.test(navigator.userAgent);
var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
var chrome = /Chrome\//.test(navigator.userAgent);
var opera = /Opera\//.test(navigator.userAgent);
var safari = /Apple Computer/.test(navigator.vendor);
var khtml = /KHTML\//.test(navigator.userAgent);
var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent);
var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
var phantom = /PhantomJS/.test(navigator.userAgent);

获取操作系统信息

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var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
// This is woefully incomplete. Suggestions for alternative methods welcome.
var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
var mac = ios || /Mac/.test(navigator.platform);
var windows = /win/i.test(navigator.platform);