| 20 | } |
| 21 | |
| 22 | function isIE(version, equation) { |
| 23 | var rv = -1, |
| 24 | re; |
| 25 | |
| 26 | if (navigator.appName == 'Microsoft Internet Explorer') { |
| 27 | re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})"); |
| 28 | } else if (navigator.appName == 'Netscape') { |
| 29 | if (navigator.userAgent.indexOf("Trident") > -1) { |
| 30 | re = new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})"); |
| 31 | } else if ((/Edge\/(\d+)./i).test(navigator.userAgent)) { |
| 32 | re = /Edge\/(\d+)./i; |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | if (re && re.exec(navigator.userAgent) != null) { |
| 37 | rv = parseFloat(RegExp.$1); |
| 38 | } |
| 39 | |
| 40 | if (rv === -1) { return false; } |
| 41 | if (!version) { return true; } |
| 42 | if (!equation) { return version === rv; } |
| 43 | if (equation === "<") { return version < rv; } |
| 44 | if (equation === ">") { return version > rv; } |
| 45 | if (equation === "<=") { return version <= rv; } |
| 46 | if (equation === ">=") { return version >= rv; } |
| 47 | } |
| 48 | |
| 49 | return { |
| 50 | // Static variable needed, publicly accessible, to be able override it in unit tests |