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vdom: Convert new_dict, old_dict from object to Map.

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Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This commit is contained in:
Anders Kaseorg
2020-02-06 03:35:21 +00:00
committed by Tim Abbott
parent 737efd1fac
commit 88c73602e0
1 changed files with 8 additions and 18 deletions
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26
static/js/vdom.js
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@@ -174,30 +174,20 @@ exports.update = (replace_content, find, new_dom, old_dom) => {
};
exports.update_attrs = (elem, new_attrs, old_attrs) => {
function make_dict(attrs) {
const dict = {};
_.each(attrs, (attr) => {
const k = attr[0];
const v = attr[1];
dict[k] = v;
});
return dict;
}
const new_dict = new Map(new_attrs);
const old_dict = new Map(old_attrs);
const new_dict = make_dict(new_attrs);
const old_dict = make_dict(old_attrs);
_.each(new_dict, (v, k) => {
if (v !== old_dict[k]) {
for (const [k, v] of new_attrs) {
if (v !== old_dict.get(k)) {
elem.attr(k, v);
}
});
}
_.each(old_dict, (v, k) => {
if (new_dict[k] === undefined) {
for (const [k] of old_attrs) {
if (!new_dict.has(k)) {
elem.removeAttr(k);
}
});
}
};
window.vdom = exports;