Javascript String Indexof Browser Support

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JavaScript String indexOf() Method

    https://www.w3schools.com/jsref/jsref_indexof.asp
    The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs. Note: The indexOf() method is case sensitive. Tip: Also look at the lastIndexOf() method.

JavaScript Feature Reference: indexOf() Method On Strings ...

    https://learnwebcoding.com/javascript/javascript_reference/indexOf_method_string.php
    The implementation test is a simple test for the presence of web browser support, and a definitive test for the absence of web browser support. If the web browser does not recognize the JavaScript indexOf() method on strings, the testing is stopped and the implementation test reports: Fail (no support): The web browser does not recognize the ...

JavaScript Feature Reference: indexOf() Method On Arrays ...

    https://learnwebcoding.com/javascript/javascript_reference/indexOf_method_array.php
    The capability test is a more definitive, albeit not an all inclusive, test for the presence of web browser support. If the web browser's implementation of the JavaScript indexOf() method on arrays includes support for the tested capability, the capability test reports: Pass (at least partial/possibly full support): The web browser recognizes ...

javascript - IndexOf not Supported in IE8 Browser - Stack ...

    https://stackoverflow.com/questions/8848097/indexof-not-supported-in-ie8-browser
    IndexOf not Supported in IE8 Browser. Ask Question ... The indexOf method of Arrays is not implemented in IE < 9, so I assume that's what the OP is referring to. ... The documentation for indexOf on MDN includes a pollyfill that will add support in browsers that don't support JavaScript 1.6.

Array.prototype.indexOf() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
    indexOf() was added to the ECMA-262 standard in the 5th edition; as such it may not be present in all browsers. You can work around this by utilizing the following code at the beginning of your scripts. This will allow you to use indexOf() when there is still no native support.4%

JavaScript String lastIndexOf() Method

    https://www.w3schools.com/jsref/jsref_lastindexof.asp
    Definition and Usage. The lastIndexOf() method returns the position of the last occurrence of a specified value in a string. Note: The string is searched from the end to the beginning, but returns the index starting at the beginning, at position 0. This method returns -1 if the value to search for never occurs.

String.prototype.startsWith() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
    The startsWith() method determines whether a string begins with the characters of a specified string, returning true or false as appropriate.

String.prototype.includes() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
    String.prototype.contains. In Firefox 18–39, the name of this method was contains().It was renamed to includes() in bug 1102219 due to the following reason:. It's been reported that some websites using MooTools 1.2 broke on Firefox 17. This version of MooTools checks whether String.prototype.contains() exists and, if it doesn't, MooTools adds its own function.

Strings - JavaScript

    https://javascript.info/string
    The “right” algorithm to do string comparisons is more complex than it may seem, because alphabets are different for different languages. So, the browser needs to know the language to compare. Luckily, all modern browsers (IE10- requires the additional library Intl.JS) support the …



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