Sharepoint read list items using ClientContext

Create a SharePoint page.
Add Content editor web part
Open notepad
Add below content

	<script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js"></script>
	<script type="text/javascript" src="/jquery-1.9.1.js"></script>
	<script type="text/javascript" src="_layouts/15/sp.runtime.js"></script>
	<script type="text/javascript" src="_layouts/15/sp.js"></script>
	<script type="text/javascript">
	var oblName = "MyList";
	if (oblName) {
	ExecuteOrDelayUntilScriptLoaded(loadList, 'sp.js');
	loadList();
	}
	function loadList() {
	getallItems(oblName);
	}
	function getallItems(oblName) {
	var objClientCtx = new SP.ClientContext.get_current();
	var objTasklist = objClientCtx.get_web().get_lists().getByTitle(oblName);
	var objQuery = SP.CamlQuery.createAllItemsQuery();
	this.objlistItems = objTasklist.getItems(objQuery);
	objClientCtx.load(objlistItems);
	objClientCtx.executeQueryAsync(onSuccess, onFail);
	}
	function onFail(sender, args) {
	alert('Failed to get Tasks list items. Error:' + args.get_message());
	}
	function onSuccess(sender, args) {
	var objlistEnumerator = objlistItems.getEnumerator();
	while (objlistEnumerator.moveNext()) {
	var objListItem = objlistEnumerator.get_current();
	$('#taskTitle').text(objListItem.get_item('Title'));
	}
	}
	</script>
	<div id="taskTitle"></div>
	<div id="message"></div>

view raw gistfile1.js hosted with ❤ by GitHub

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Edit Content editor web part
Provide url which you get from above step in "Content Link" section.
Save.