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How to write blinking in a more elegant way

Purpose: write js (using jquery) which will do 2 line blinks.

I currently have

var $second_row = $('table tr:eq(1)'),
    target_color = 'PaleGreen',
    original_color = $second_row.css('background-color');

$second_row.css('background-color', target_color);
scheduleOriginalColor();

function scheduleTargetColor() {
    setTimeout(function() {
        $second_row.css('background-color', target_color);
        scheduleOriginalColor(true);
    }, 500);
}

function scheduleOriginalColor(stop) {
    setTimeout(function() {
        $second_row.css('background-color', original_color);

        if (!stop) {
            scheduleTargetColor();
        }
    }, 500);
}
​

http://jsfiddle.net/zerkms/ecfMU/1/

But it looks ugly, and I'm sure there is a better way to write the same thing.

Any suggestions?

UPD : there is my second attempt, a little more understandable: http://jsfiddle.net/zerkms/ecfMU/2/

var $second_row = $('table tr:eq(1)'),
    target_color = 'PaleGreen',
    original_color = $second_row.css('background-color');

setRowColor(target_color, 500);
setRowColor(original_color, 1000);
setRowColor(target_color, 1500);
setRowColor(original_color, 2000);

function setRowColor(color, timing) {
    setTimeout(function() {
        $second_row.css('background-color', color);
    }, timing);
}
​
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6 answers

Try this using toggleClassbackground color:

var blink = setInterval(function() {
    $('table tr:eq(1)').toggleClass('highlight');
}, 500);
setTimeout(function() {
    clearInterval(blink);
}, 2100); // run 4 times, added a little padding time just in case

.highlight {
    background-color:PaleGreen;
}

Demo: http://jsfiddle.net/ecfMU/10/

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, , . , - jQuery. JavaScript, .

function flashBG( e, c, x, z ) {
  var d = e.style.backgroundColor, i = 0, f = setInterval(function(){
    e.style.backgroundColor = ( e.style.backgroundColor == d ) ? c : d ;
    ++i == ( x * 2 ) && clearInterval( f );
  }, z );
}

:

flashBG( document.body, "PaleGreen", 2, 500 );

: http://jsbin.com/axuxiy/3/edit

:

function flashBG( element, color, flashes, speed ) {
  var original = element.style.backgroundColor;
  var counter  = 0;
  var interval = setInterval(
    function() {
      if ( original === element.style.backgroundColor ) {
        element.style.backgroundColor = color; 
      } else {
        element.style.backgroundColor = original;
      }
      if ( ++counter == ( flashes * 2 ) ) {
        clearInterval( interval );
      }
    }, speed );
}
+7

Javascript , .

EDIT: EDIT # 2: -

... - int var . , :

//Somewhere else we have:
//var colorArray = blah... blah.. blahh, it has values [palegreen,regularwhite]

//blah blah scheduleColor(0);
//var numBlinks = 2;

//then for your scheduler
function scheduleColor(ind) {
    $second_row.css('background-color', colorArray[ind % colorArray.length]);
    if (ind < (colorArray.length * numBlinks) - 1) {
        setTimeout(function() {
            scheduleColor(ind + 1);
        }, 500);
    }
}

, , . , .

, , .

/.

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My answer for you is the portfolio of Wesley and Ricardo's answers, so I can't brag about it. I am .delay () and .queue () along with .toggleClass (). I think this ends with good code.

Some CSS:

.highlight {
    background-color:PaleGreen;
}

And JS:

var $second_row = $('table tr:eq(1)');

function blink(el) {
    el.addClass('highlight');
    for(i=0; i<3; i++) {
        el.delay(500).queue(function() {
            $(this).toggleClass('highlight');
            $(this).dequeue();
        });
    }
}

blink($second_row);​

Scenario

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var $second_row = $('table tr:eq(1)'),
    target_color = 'PaleGreen',
    original_color = $second_row.css('background-color');


$second_row.css('background-color', target_color).delay(500).queue(function(){
    jQuery(this).css('background-color', original_color);
});

Work: Fiddle

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Can you add jQuery UI?

If so, you can animate the background for a smoother transition.

http://jsfiddle.net/ecfMU/18/

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