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Update comment on MELS key

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This commit is contained in:
Luke Barnard 2016-12-15 18:26:41 +00:00
parent 88aeb6417e
commit 6b52b247e7
1 changed files with 5 additions and 2 deletions
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7
src/components/structures/MessagePanel.js
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@ -300,8 +300,11 @@ module.exports = React.createClass({
// member events. This will prevent it from being re-created unnecessarily, and
// instead will allow new props to be provided. In turn, the shouldComponentUpdate
// method on MELS can be used to prevent unnecessary renderings.
// `prevEvent` at this point is a non-member event or null.
const key = "memberlistsummary-" + (prevEvent ? mxEv.getId() : "initial");
//
// Whilst back-paginating with a MELS at the top of the panel, prevEvent will be null,
// so use the key "membereventlistsummary-initial". Otherwise, use the ID of the first
// membership event, which will not change during forward pagination.
const key = "membereventlistsummary-" + (prevEvent ? mxEv.getId() : "initial");
if (this._wantsDateSeparator(prevEvent, ts1)) {
let dateSeparator = <li key={ts1+'~'}><DateSeparator key={ts1+'~'} ts={ts1}/></li>;