![]() ![]() I would also think about scalability before selecting Wi-Fi based switches. I think normal top on/bottom off rockers (like Insteon) look nicer, are more intuitive to use, and offer more programming options because they can support things like "multi-tap", "hold to dim/brighten", etc. Note that only preferred and alternate style sheet link elements will have a title attribute.įor(i=0 (a = document.Personally I'm not a fan of push on/push off toggle switches. This involves looping through every link element in the document, disablingĪll preferred and alternate style sheets that we don’t want active, and enabling all preferred and alternate style sheets that we do want active. Using these three checks we can write a function to switch style sheets. Note that we check for the string “alt” because some browsers accept the keyword “alternative” in place of “alternate.” HTMLLinkElement.getAttribute("rel").indexOf("alt") != -1 HTMLLinkElement.getAttribute("rel").indexOf("style") != -1ĭoes the rel attribute contain the keyword “alternate”? Need to check two of the attributes of each link element. This is relatively easy to do, as we only The Script #section7įirst we need the script to be able to differentiate between the threeĭifferent types of style sheet. Interfere with the menu in Mozilla, and it degrades very gracefully. We are using the link tags as the W3C tells us to, the JavaScript doesn’t Their preference can also be stored in a cookie. Provide a way for MSIE and Mozilla users to select the style sheet they Here’s where a little bit of JavaScript can be used along with the DOM to So we have several style sheets, and no way to access them in MSIE. But Microsoft Internet Explorer (MSIE) provides no such Mozilla provides a menu to select the style sheet we want to use under the We have several style sheets and the visitor can choose theirįavorite from a menu. ![]() The W3C tells us that the browser should give us aĬhoice of the style sheet we want to use, and suggests that perhaps aĭrop–down menu or tool bar will be provided. When a document is initially loaded, the persistent and preferred style Note that these relationships only apply to external style sheets which are Using the previous example again to make paul.css into an alternate style sheet, the keyword “alternate” is added to the rel attribute. Preferred sheets, these style sheets can also be grouped together by giving Stylesheet” and the style sheet is named with a title attribute. ![]() To specify an alternate style sheet, the rel attribute is set to “alternate This allows the visitor to personalize a site andĬhoose his or her favorite scheme. These style sheets can be selected by the visitor as alternatives to the To make paul.css preferred, a title attribute is added, giving the default style a name. If more than one group of preferred style sheets areĭeclared, the first group takes precedence. These grouped style sheets are then all enabled andĭisabled together. Several preferred style sheets can be grouped together by giving them identical “stylesheet” and the style sheet is named with the title attribute. To make a style sheet preferred, the rel attribute is set to They can then be disabled if the user selects an alternate style sheet. These style sheets are enabled by default (they are “on” when the page is loaded). To make the style sheet paul.css persistent, the following link element Rel attribute is set to “stylesheet” and no title attribute is set. They can be used for shared rules common to every style sheet. These style sheets are always enabled (they are always “on”) and are combined with the active style sheet. There are three different relationships external style sheetsĬan have with the document: persistent, preferred, and alternate. Style sheets can be associated with documents using a list of link elements But now you need a cross-browser way to dynamically switch between the style sheets. 3 days of design, code, and content for web & UX designers & devs. ![]()
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