//函数调用
$("#code").typewriter();
//具体函数实现
(function($) {
$.fn.typewriter = function() {
this.each(function() {
var $ele = $(this), str = $ele.html(), progress = 0;
$ele.html('');
var timer = setInterval(function() {
var current = str.substr(progress, 1);
if (current == '<') {
progress = str.indexOf('>', progress) + 1;
} else {
progress++;
}
$ele.html(str.substring(0, progress) + (progress & 1 ? '_' : ''));
if (progress >= str.length) {
clearInterval(timer);
}
}, 75);
});
return this;
};
})(jQuery);