发生短路时未闭合的字符串错误
这个问题在这里已经有了答案：
做这样的事情
$this.append(
'<a href="' + slideLink + '"' + slideTarget + '>
<span class="slide-time-date"></span>
<div class="slide-overlay-text slide-overlay-text-mobile"' + slideColour + '>
<span>' + slideOverlaytext + '</span>
</div>
<div class="slide-overlay-text slide-overlay-text-tablet"' + slideColour + '>
<span>' + slideOverlaytext + '</span>
</div>
<div class="slide-overlay-text slide-overlay-text-desktop"' + slideColour + '>
<span>' + slideOverlaytext + '</span>
</div>
<img src="' + slideImg + '" alt="' + slideTitle + '" />
</a>'
);