javascript - jquery/Javascript 语法

Question

我想弄清楚下面的语法是做什么的。它是来自 Bootstraps 弹出窗口的代码。

//title is a string
$tip.find('.popover-title')[ $.type(title) == 'object' ? 'append' : 'html' ](title)
                           ^                                                 ^
                       What does this symbol mean?                    Whats happening here?

Answer 1

让我们分解一下:

$tip.find('.popover-title')[ $.type(title) == 'object' ? 'append' : 'html' ](title)

可以分解为:

var found = $tip.find('.popover-title');
found[$.type(title) == 'object' ? 'append' : 'html'](title);

还有更多:

var found = $tip.find('.popover-title');

if ($.type(title) == 'object') {
  found['append'](title);
} else {
  found['html'](title);
}

多一点:

var found = $tip.find('.popover-title');

if ($.type(title) == 'object') {
  found.append(title);
} else {
  found.html(title);
}