Add a new property to the SPWeb property bag in JSOM #Javascript #SharePoint #SOAP

Add-new-property-bag-property-JSOM.js

        function AddWebSiteProperties(siteUrl) {
 
            var clientContext = new SP.ClientContext(siteUrl);
 
            oWebsite = clientContext.get_web();
            alert(oWebsite);
            
            clientContext.load(oWebsite);
            alert("Load");
            var props = oWebsite.get_allProperties();
 
            props.set_item("Myproperty", "PropertyValue");
            oWebsite.update();
            clientContext.load(oWebsite);
 
            clientContext.executeQueryAsync(
                Function.createDelegate(this, this.onQuerySucceeded2),
                Function.createDelegate(this, this.onQueryFailed2)
             );
        }
 
 
 
 
 
 
        function onQuerySucceeded2(sender, args) {
            alert("Success");         }
 
        function onQueryFailed2(sender, args) {
            alert("Failed");
            alert('Request failed. ' + args.get_message() +
                '\n' + args.get_stackTrace());
        }