javascript - Select sibling & parent with Cheerio -

i've been unable access simple pieces of html using cheerio, finished opening object $(this) object , tracking down need. error occurs when there no object in stack, sibling or child. what's correct way select previous sibling, it's name, href & content, parent's css.

var code = $('code.lang-javascript, code.lang-js') dataset.blocks = [] code.map(function (i, elm) {   var block = {}   block.prevsiblingtag = $(this).parent().prev()[0].children[0].name   block.prevsiblinghref = $(this).parent().prev()[0].children[0].attribs.href   block.prevsiblingcontent = $(this).parent().prev()[0].children[0].text()   block.parenttag = $(this)[0].name   block.parentclass = $(this)[0].attribs.class   block.code = $(this).html()   dataset.blocks.push(block) }) 

i doing , mess.

var $parent = $($(this).parent().html()) var $prevsibling = $($(this).parents().prev()) var block = {} block.parentclass = $parent.attr('class') block.prevsibling = $prevsibling.html() block.code = $(this).html() 

the problem if there no children previous sibling $(this).parent().prev()[0] null.

so better jquery obeject reference target element use attribute/property values like

var code = $('code.lang-javascript, code.lang-js') dataset.blocks = code.map(function (i, elm) {     var block = {}, $this = $(this),         target = $this.parent().prev().children().eq(0);     block.prevsiblingtag = target.attr('name');     block.prevsiblinghref = target.attr('href');     block.prevsiblingcontent = target.text()     block.parenttag = this.name     block.parentclass = $this.attr('class')     block.code = $this.html()     return block; }).get(); 

also since using .map(), can return array