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[jQuery] ³ª¸¸ÀÇ Áö¿¬µÈ °´Ã¼(Deferred Object) ¸¸µé±â.
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jQuery Deferred Object ¿¡ Á» ´õ ÀÀ¿ëÀ» ÇÏ°í ½ÍÀº ºÐ²² ÀÌ ÆÁÀ» ¹ÙĨ´Ï´Ù.

jQuery Deferred core °´Ã¼¸¦ jQuery.Deferred ¸Þ¼­µå·Î Á¦°øÇÕ´Ï´Ù. À̸¦ ÀÌ¿ëÇÏ¿© ÇÔ¼ö¸¦ ÀÛ¼ºÇÏ°í, Áö¿¬µÈ °á°ú¸¦ ºÒ·¯¿É´Ï´Ù. ÀÚ½ÅÀÌ setTimeout À» ºÒ·¯¿À°Å³ª, jQuery ¿Ü Ÿ Ç÷¯±×Àΰú ¿¬µ¿½Ã À¯¿ëÇÏ°Ô »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.
    $.Deferred(function() { //»ç¿ëÀÚ Á¤ÀÇ ÇÔ¼ö·Î Áö¿¬µÈ °´Ã¼ »ý¼º
        var self = this; //Áö¿¬µÈ °´Ã¼ ÀڽŠÂüÁ¶
        setTimeout(function() { //Áö¿¬ ½Ã°£ ¼³Á¤
            // ¿©±â¿¡ ÇÏ°íÀÚ ÇÏ´Â ÀÛ¾÷ ½ÇÇà
            self.resolve(); //Áö¿¬ »óŸ¦ ¾Ë¸²
        }, 2000);
    });

¾î¶§¿ä. Âü ½±ÁÒ? ±×·¸´Ù¸é Áö¿¬µÈ °´Ã¼ »óÅ¿¡ µû¸¥ ÄݹéÀº ¾î¶»°Ô ¼³Á¤ÇÒ °ÍÀΰ¡? °£´ÜÇÕ´Ï´Ù.
$.when(first(), second()) //2°³ÀÇ Áö¿¬ °´Ã¼¸¦ ½ÇÇàÇÕ´Ï´Ù.
    .then(doneCallback, failCallback, progressCallback); //Áö¿¬µÈ °´Ã¼µéÀÌ ¸ðµÎ ¿Ï·á/½ÇÆÐ/½ÃÇàÁßµÈ »óÅÂÀ϶§ °¢°¢ Äݹé
    .done(callback); //Áö¿¬µÈ °´Ã¼µéÀÌ ¸ðµÎ ¿Ï·áµÈ »óÅÂÀ϶§ Äݹé
    .fail(callback); //Áö¿¬µÈ °´Ã¼µéÀÌ ¸ðµÎ ½ÇÆÐµÈ »óÅÂÀ϶§ Äݹé
    .always(callback); //Áö¿¬µÈ °´Ã¼µéÀÌ »óÅ º¯°æÀÌ ³¡³­ »óÅÂÀÏ ¶§¿¡ (¿Ï·á/½ÇÆÐ ´Ù) Äݹé.

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