How to use 'map in angular 6' in JavaScript

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function render5(){
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	var context = {
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		'teams': [{
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			'name':'Cats',
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			'players':[	
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				{"name":"Alice Keasler", "score":14}, 
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				{"name":"", "score":0},  //show an example of space and zero
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				{"name":"Vicky Benoit", "score":15}, 
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				{"name":"Wayne Dartt", "score":11}]},{
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			'name':'Dogs',
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			'players': [
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				{"name":"Ray Braun", "score":14}, 
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				{"name":"Aaron Ben", "score":24}, 
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				{"name":"Steven Smith", "score":1}, 
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				{"name":"Kim Caffey", "score":19}]},{
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			'name':'Mices',
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			'players': [
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				{"name":"Natalie Kinney", "score":16}, 
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				{"name":"Caren Cohen", "score":3}]}]}
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	var scoreBoard = $$('table.scoreBoard')[0].mapDirective({
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		'tbody tr': 'team <- teams',
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		'td.teamName': 'team.name'
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	});
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	var teamList = scoreBoard.select('table.teamList')[0]
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		.mapDirective({
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			'tbody tr': 'player <- team.players',
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			'td.player': 'player.name',
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			'td.score': 'player.score',
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			'td.position': lineNb, //passing the pointer of a function that does not use "this"
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			'tbody tr[class]': function(arg){ return row.decorator(arg) } }); //show how to wrap a method and not breack the use of "this"
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	scoreBoard.select('td.teamPlace')[0].innerHTML = $p.utils.outerHTML(teamList); //place sub-template teamList in scoreBoard
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	$p.compile(scoreBoard, 'f5'); //compile to a function
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    $('render5').innerHTML = $p.render('f5', context);} //place the result of the transformation to the innerHTML of div#render5