OK. While it’s more or less impossible to give a reasonable solution to such a general question, I’ll just add my 2 cents’ worth:<\/p>\n
One possible source of “undefined variable”<\/em> errors comes from including several scripts, which may or may not always load and execute in the same order. If you define a variable in one script (let’s call that script If you’re interested in this very topic, have a look at e.g. Steve Souders’ book Even faster web sites<\/em>, published by O’Reilly. More specifically, look at the chapter about non-blocking script loading.<\/p>\n Originally posted 2013-11-09 23:11:58. <\/small><\/p>","protected":false},"excerpt":{"rendered":" OK. While it’s more or less impossible to give a reasonable solution to such a general question, I’ll just add my 2 cents’ worth: One possible source of “undefined variable” errors comes from including several scripts, which may or may not always load and execute in the same order. If you define a variable in […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-995","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=995"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/995\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}declare.js<\/code>) and use it in another (let’s say use.js<\/code>), and use.js<\/code> is executed before declare.js<\/code>, then you will get such an error. If the scripts execute the other way around, everything will appear fine.<\/p>\n