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Is there a correct order for attributes to be specified when linking external files?

When declaring external files in HTML, such as .css or .js, is there a correct way to place link attributes? For instance:

<link rel="stylesheet" type="text/css" href="../_css/style.css">

or

 <link type="text/css" rel="stylesheet" href="../_css/style.css">

or

 <link href="../_css/style.css" type="text/css" rel="stylesheet">

Does it matter?

The same question is about attributes for linking to external JavaScript files.

Thank you for your time.

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2 answers

No, the order of the attributes does not matter.

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Any order is valid HTML, but only out of curiosity. I wondered if the external file would be loaded earlier if the href attribute was the first. I created 3 documents, each of which had a <link> with href attribute positions in different ways, in order to see the difference, it took 200 additional attributes. In Chrome, at least the sooner you put href , the better. rel should also be installed earlier, as this will help the browser decide whether to download the file.

Delay range from ("Empty cache" and "Hard restart" to start the "queue") * 10

  • No additional attributes: 19.5 ms - 25 ms
  • href before additional attributes: 17.5 ms - 23.5 ms
  • href after additional attributes: 21.5ms - 27.5ms

Even with 200 additional attributes, the additional delay was a maximum of 10 ms (27.5-17.5).

When I worked on the interface, I always thought that there is no such thing as useless micro-optimization, but this is really one thing.

 <html> <head> <meta charset="UTF-8"> <title>Document</title> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css?id=none"> </head> <body> </body> </html> 

 <html> <head> <meta charset="UTF-8"> <title>Document</title> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css?id=before" data-attr-1="1" data-attr-2="2" data-attr-3="3" data-attr-4="4" data-attr-5="5" data-attr-6="6" data-attr-7="7" data-attr-8="8" data-attr-9="9" data-attr-10="10" data-attr-11="11" data-attr-12="12" data-attr-13="13" data-attr-14="14" data-attr-15="15" data-attr-16="16" data-attr-17="17" data-attr-18="18" data-attr-19="19" data-attr-20="20" data-attr-21="21" data-attr-22="22" data-attr-23="23" data-attr-24="24" data-attr-25="25" data-attr-26="26" data-attr-27="27" data-attr-28="28" data-attr-29="29" data-attr-30="30" data-attr-31="31" data-attr-32="32" data-attr-33="33" data-attr-34="34" data-attr-35="35" data-attr-36="36" data-attr-37="37" data-attr-38="38" data-attr-39="39" data-attr-40="40" data-attr-41="41" data-attr-42="42" data-attr-43="43" data-attr-44="44" data-attr-45="45" data-attr-46="46" data-attr-47="47" data-attr-48="48" data-attr-49="49" data-attr-50="50" data-attr-51="51" data-attr-52="52" data-attr-53="53" data-attr-54="54" data-attr-55="55" data-attr-56="56" data-attr-57="57" data-attr-58="58" data-attr-59="59" data-attr-60="60" data-attr-61="61" data-attr-62="62" data-attr-63="63" data-attr-64="64" data-attr-65="65" data-attr-66="66" data-attr-67="67" data-attr-68="68" data-attr-69="69" data-attr-70="70" data-attr-71="71" data-attr-72="72" data-attr-73="73" data-attr-74="74" data-attr-75="75" data-attr-76="76" data-attr-77="77" data-attr-78="78" data-attr-79="79" data-attr-80="80" data-attr-81="81" data-attr-82="82" data-attr-83="83" data-attr-84="84" data-attr-85="85" data-attr-86="86" data-attr-87="87" data-attr-88="88" data-attr-89="89" data-attr-90="90" data-attr-91="91" data-attr-92="92" data-attr-93="93" data-attr-94="94" data-attr-95="95" data-attr-96="96" data-attr-97="97" data-attr-98="98" data-attr-99="99" data-attr-100="100" data-attr-101="101" data-attr-102="102" data-attr-103="103" data-attr-104="104" data-attr-105="105" data-attr-106="106" data-attr-107="107" data-attr-108="108" data-attr-109="109" data-attr-110="110" data-attr-111="111" data-attr-112="112" data-attr-113="113" data-attr-114="114" data-attr-115="115" data-attr-116="116" data-attr-117="117" data-attr-118="118" data-attr-119="119" data-attr-120="120" data-attr-121="121" data-attr-122="122" data-attr-123="123" data-attr-124="124" data-attr-125="125" data-attr-126="126" data-attr-127="127" data-attr-128="128" data-attr-129="129" data-attr-130="130" data-attr-131="131" data-attr-132="132" data-attr-133="133" data-attr-134="134" data-attr-135="135" data-attr-136="136" data-attr-137="137" data-attr-138="138" data-attr-139="139" data-attr-140="140" data-attr-141="141" data-attr-142="142" data-attr-143="143" data-attr-144="144" data-attr-145="145" data-attr-146="146" data-attr-147="147" data-attr-148="148" data-attr-149="149" data-attr-150="150" data-attr-151="151" data-attr-152="152" data-attr-153="153" data-attr-154="154" data-attr-155="155" data-attr-156="156" data-attr-157="157" data-attr-158="158" data-attr-159="159" data-attr-160="160" data-attr-161="161" data-attr-162="162" data-attr-163="163" data-attr-164="164" data-attr-165="165" data-attr-166="166" data-attr-167="167" data-attr-168="168" data-attr-169="169" data-attr-170="170" data-attr-171="171" data-attr-172="172" data-attr-173="173" data-attr-174="174" data-attr-175="175" data-attr-176="176" data-attr-177="177" data-attr-178="178" data-attr-179="179" data-attr-180="180" data-attr-181="181" data-attr-182="182" data-attr-183="183" data-attr-184="184" data-attr-185="185" data-attr-186="186" data-attr-187="187" data-attr-188="188" data-attr-189="189" data-attr-190="190" data-attr-191="191" data-attr-192="192" data-attr-193="193" data-attr-194="194" data-attr-195="195" data-attr-196="196" data-attr-197="197" data-attr-198="198" data-attr-199="199" data-attr-200="200"> </head> <body> </body> </html> 

 <html> <head> <meta charset="UTF-8"> <title>Document</title> <link rel="stylesheet" data-attr-1="1" data-attr-2="2" data-attr-3="3" data-attr-4="4" data-attr-5="5" data-attr-6="6" data-attr-7="7" data-attr-8="8" data-attr-9="9" data-attr-10="10" data-attr-11="11" data-attr-12="12" data-attr-13="13" data-attr-14="14" data-attr-15="15" data-attr-16="16" data-attr-17="17" data-attr-18="18" data-attr-19="19" data-attr-20="20" data-attr-21="21" data-attr-22="22" data-attr-23="23" data-attr-24="24" data-attr-25="25" data-attr-26="26" data-attr-27="27" data-attr-28="28" data-attr-29="29" data-attr-30="30" data-attr-31="31" data-attr-32="32" data-attr-33="33" data-attr-34="34" data-attr-35="35" data-attr-36="36" data-attr-37="37" data-attr-38="38" data-attr-39="39" data-attr-40="40" data-attr-41="41" data-attr-42="42" data-attr-43="43" data-attr-44="44" data-attr-45="45" data-attr-46="46" data-attr-47="47" data-attr-48="48" data-attr-49="49" data-attr-50="50" data-attr-51="51" data-attr-52="52" data-attr-53="53" data-attr-54="54" data-attr-55="55" data-attr-56="56" data-attr-57="57" data-attr-58="58" data-attr-59="59" data-attr-60="60" data-attr-61="61" data-attr-62="62" data-attr-63="63" data-attr-64="64" data-attr-65="65" data-attr-66="66" data-attr-67="67" data-attr-68="68" data-attr-69="69" data-attr-70="70" data-attr-71="71" data-attr-72="72" data-attr-73="73" data-attr-74="74" data-attr-75="75" data-attr-76="76" data-attr-77="77" data-attr-78="78" data-attr-79="79" data-attr-80="80" data-attr-81="81" data-attr-82="82" data-attr-83="83" data-attr-84="84" data-attr-85="85" data-attr-86="86" data-attr-87="87" data-attr-88="88" data-attr-89="89" data-attr-90="90" data-attr-91="91" data-attr-92="92" data-attr-93="93" data-attr-94="94" data-attr-95="95" data-attr-96="96" data-attr-97="97" data-attr-98="98" data-attr-99="99" data-attr-100="100" data-attr-101="101" data-attr-102="102" data-attr-103="103" data-attr-104="104" data-attr-105="105" data-attr-106="106" data-attr-107="107" data-attr-108="108" data-attr-109="109" data-attr-110="110" data-attr-111="111" data-attr-112="112" data-attr-113="113" data-attr-114="114" data-attr-115="115" data-attr-116="116" data-attr-117="117" data-attr-118="118" data-attr-119="119" data-attr-120="120" data-attr-121="121" data-attr-122="122" data-attr-123="123" data-attr-124="124" data-attr-125="125" data-attr-126="126" data-attr-127="127" data-attr-128="128" data-attr-129="129" data-attr-130="130" data-attr-131="131" data-attr-132="132" data-attr-133="133" data-attr-134="134" data-attr-135="135" data-attr-136="136" data-attr-137="137" data-attr-138="138" data-attr-139="139" data-attr-140="140" data-attr-141="141" data-attr-142="142" data-attr-143="143" data-attr-144="144" data-attr-145="145" data-attr-146="146" data-attr-147="147" data-attr-148="148" data-attr-149="149" data-attr-150="150" data-attr-151="151" data-attr-152="152" data-attr-153="153" data-attr-154="154" data-attr-155="155" data-attr-156="156" data-attr-157="157" data-attr-158="158" data-attr-159="159" data-attr-160="160" data-attr-161="161" data-attr-162="162" data-attr-163="163" data-attr-164="164" data-attr-165="165" data-attr-166="166" data-attr-167="167" data-attr-168="168" data-attr-169="169" data-attr-170="170" data-attr-171="171" data-attr-172="172" data-attr-173="173" data-attr-174="174" data-attr-175="175" data-attr-176="176" data-attr-177="177" data-attr-178="178" data-attr-179="179" data-attr-180="180" data-attr-181="181" data-attr-182="182" data-attr-183="183" data-attr-184="184" data-attr-185="185" data-attr-186="186" data-attr-187="187" data-attr-188="188" data-attr-189="189" data-attr-190="190" data-attr-191="191" data-attr-192="192" data-attr-193="193" data-attr-194="194" data-attr-195="195" data-attr-196="196" data-attr-197="197" data-attr-198="198" data-attr-199="199" data-attr-200="200" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css?id=after"> </head> <body> </body> </html>
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Source: https://habr.com/ru/post/1347877/

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