JavaScript & DHTML Cookbook, 2nd Edition by Danny Goodman

By Danny Goodman

In modern day internet 2.0 international, JavaScript and Dynamic HTML are on the middle of the recent new method of designing hugely interactive pages at the consumer facet. With this surroundings in brain, the hot version of this ebook deals bite-sized ideas to very particular scripting difficulties that internet builders regularly face. every one recipe encompasses a centred piece of code so you might insert correct into your software. Why is JavaScript & DHTML Cookbook so well known? After interpreting millions of discussion board threads through the years, writer and scripting pioneer Danny Goodman has compiled an inventory of difficulties that regularly vex scripters of assorted event degrees. for each challenge he addresses, Goodman not just bargains code, yet a dialogue of ways and why the answer works. Recipes diversity from easy projects, equivalent to manipulating strings and validating dates in JavaScript, to whole libraries that show advanced projects, akin to cross-browser positioning of HTML parts, sorting tables, and imposing Ajax beneficial properties at the consumer.

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Different browsers save their cookies differently (and in different places in each operating system). IE stores each domain’s cookies in its own text file, whereas Mozilla gangs all cookies together in a single text file. cookie property. cookie property, which isn’t as helpful as it could be in extracting cookie information. Although you can save a cookie with several parameters, only the value of a cookie is available for reading—not the expiration date, path, or domain details. Cookies are commonly used to preserve user preference settings between visits.

9 shows how to do this. Working with dates in JavaScript can be rather puzzling at times. Perhaps the most difficult concept to comprehend is when you create a date object (either for the present or for some other date and time), the object instance stores its value as an integer representing the number of milliseconds from the start of January 1, 1970. More importantly, the point of reference for all date values is Coordinated Universal Time (UTC), which is essentially the same as Greenwich Mean Time (GMT).

Be sure to specify the g modifier for the regular expression to force the replace( ) method to operate globally on the original string; otherwise, only the first instance is replaced. Discussion To work this regular expression mechanism into a practical function, you need some helpful surrounding code. If the string you are looking for is in the form of a string variable, you can’t use the literal syntax for creating a regular expression as just shown. replace(re, replaceStr); In working with a text-based form control or an element’s text node, you can perform the replace( ) operation on the value of the existing text, and immediately assign the results back to the original container.

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