当页面加载不起作用时，Javascript/JQuery 会弹出一个警报

Question

I'm trying to get an alert to pop up when my web page loads.我正在尝试在我的网页加载时弹出警报。 The Javascript code works when inline coded to the html code, but when placed into a separate file and linked/saved as script.js nothing happens.当内联编码到 html 代码时，Javascript 代码有效，但当放入单独的文件并链接/保存为 script.js 时，没有任何反应。 Can anyone by chance see what I'm doing wrong?任何人都可以偶然看到我做错了什么吗？ Here's the code, if you happen to see where I'm going wrong I would really appreciate it.这是代码，如果您碰巧看到我出错的地方，我将不胜感激。

 $(document).ready(function() { alert("Welcome!); });

 background-color:Teal; } h1 { text-align: center; color: Gold; font-family: arial; font-size: 25pt; } #p1 { text-align: left; color: white; font-family: arial; font-size: 14pt; margin-top: 40px; margin-bottom: 20px; margin-left: 10px; margin-right: 300px; } #p2 { text-align: right; color: white; font-family: arial; font-size: 14pt; margin-top: 100px; margin-bottom: 20px; margin-left: 300px; margin-right: 10px; } #p3 { text-align: left; color: white; font-family: arial; font-size: 14pt; margin-top: 100px; margin-bottom: 20px; margin-left: 10px; margin-right: 300px; } #img1 { float: left; padding-right: 15px; width: 200px; } #img2 { float: right; padding-left: 15px; width: 200px; } a:link { color: gold; background-color: transparent; font-family: arial; text-decoration: none; } a:visited { color: gold; background-color: transparent; font-family: arial; text-decoration: none; } a:hover { color: white; background-color: transparent; font-family: arial; text-decoration: underline; } a:active { color: lime; background-color: transparent; font-family: arial; text-decoration: underline; }

 <!DOCTYPE html> <html> <head> <title> "Cute Cats" </title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <link rel="stylesheet" type="text/css" href="styles.css"> </head> <body> <script src="script.js"> </script> <h1> Cute Cats </h1> <p id="p1"> <img src="Tulip.jpg" alt="Cute Cat-Tulip" id="img1"> Find box a little too small and curl up with fur hanging out lick arm hair or sweet beast swat at dog, and chirp at birds that box? i can fit in that box. Spit up on light gray carpet instead of adjacent linoleum. Spill litter box, scratch at owner, destroy all furniture, especially couch find empty spot in cupboard and sleep all day, licks paws ptracy,intently sniff hand, or really likes hummus weigh eight pounds but take up a full-size bed. Chew the plant. Bleghbleghvomit my furball really tie the room together hiss and stare at nothing then run suddenly away and warm up laptop with butt lick butt fart rainbows until owner yells pee in litter box hiss at cats stretch, ooh, are those your $250 dollar sandals? </p> <p id="p2"> <img src="Tikki.jpg" alt="Cute Cat-Tikki" id="img2"> Slap kitten brother with paw spread kitty litter all over house, i could pee on this if i had the energy purr when being pet for nya nya nyan. Touch water with paw then recoil in horror eat all the power cords for chill on the couch table, annoy the old grumpy cat, start a fight and then retreat to wash when i lose so scratch me there, elevator butt refuse to come home when humans are going to bed; stay out all night then yowl like i am dying at 4am. Eat the rubberband the cat was chasing the mouse so demand to be let outside at once, and expect owner to wait for me as i think about it yet taco cat backwards spells taco cat furrier and even more furrier hairball for groom forever, stretch tongue and leave it slightly out, blep stand in front of the computer screen. Red light attracts my eyes, light must die, attack! </p> <p id="p3"> <img src="Maddi.jpg" alt="Cute Cat-Maddison" id="img1"> More napping, more napping all the napping is exhausting. Fish i must find my red catnip fishy fish who's the baby pet me pet me don't pet me scratch need to chase tail, but intently stare at the same spot, or i like frogs and 0 gravity. Meow to be let out thinking longingly about tuna brine or catasstrophe scratch, yet stare at wall turn and meow stare at wall some more meow again continue staring take a big fluffing crap cough hairball on conveniently placed pants. Lounge in doorway hiding behind the couch until lured out by a feathery toy. Sit on human give attitude, or meow go back to sleep owner brings food and water tries to pet on head, so scratch get sprayed by water because bad cat or lick butt. Stare at ceiling. </p> </body>

Again any insight would be much appreciated.再次，任何见解将不胜感激。

Answer 1

You were missing the end double quotes in your alert.您在警报中遗漏了结尾的双引号。 I fixed it for you in the snippet below.我在下面的代码段中为您修复了它。

Note: It's redundant to include jQuery twice , so remove that.注意：两次包含 jQuery 是多余的，所以删除它。 (If the reason you included jQuery twice was because it asks you to in the snippet, you don't have to if you already included it from somewhere else). （如果您两次包含 jQuery 的原因是因为它要求您在代码段中这样做，那么如果您已经从其他地方包含它，则不必这样做）。

 $(document).ready(function() { alert("Welcome!"); });

 background-color:Teal; } h1 { text-align: center; color: Gold; font-family: arial; font-size: 25pt; } #p1 { text-align: left; color: white; font-family: arial; font-size: 14pt; margin-top: 40px; margin-bottom: 20px; margin-left: 10px; margin-right: 300px; } #p2 { text-align: right; color: white; font-family: arial; font-size: 14pt; margin-top: 100px; margin-bottom: 20px; margin-left: 300px; margin-right: 10px; } #p3 { text-align: left; color: white; font-family: arial; font-size: 14pt; margin-top: 100px; margin-bottom: 20px; margin-left: 10px; margin-right: 300px; } #img1 { float: left; padding-right: 15px; width: 200px; } #img2 { float: right; padding-left: 15px; width: 200px; } a:link { color: gold; background-color: transparent; font-family: arial; text-decoration: none; } a:visited { color: gold; background-color: transparent; font-family: arial; text-decoration: none; } a:hover { color: white; background-color: transparent; font-family: arial; text-decoration: underline; } a:active { color: lime; background-color: transparent; font-family: arial; text-decoration: underline; }

 <!DOCTYPE html> <html> <head> <title> "Cute Cats" </title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <link rel="stylesheet" type="text/css" href="styles.css"> </head> <body> <script src="script.js"> </script> <h1> Cute Cats </h1> <p id="p1"> <img src="Tulip.jpg" alt="Cute Cat-Tulip" id="img1"> Find box a little too small and curl up with fur hanging out lick arm hair or sweet beast swat at dog, and chirp at birds that box? i can fit in that box. Spit up on light gray carpet instead of adjacent linoleum. Spill litter box, scratch at owner, destroy all furniture, especially couch find empty spot in cupboard and sleep all day, licks paws ptracy,intently sniff hand, or really likes hummus weigh eight pounds but take up a full-size bed. Chew the plant. Bleghbleghvomit my furball really tie the room together hiss and stare at nothing then run suddenly away and warm up laptop with butt lick butt fart rainbows until owner yells pee in litter box hiss at cats stretch, ooh, are those your $250 dollar sandals? </p> <p id="p2"> <img src="Tikki.jpg" alt="Cute Cat-Tikki" id="img2"> Slap kitten brother with paw spread kitty litter all over house, i could pee on this if i had the energy purr when being pet for nya nya nyan. Touch water with paw then recoil in horror eat all the power cords for chill on the couch table, annoy the old grumpy cat, start a fight and then retreat to wash when i lose so scratch me there, elevator butt refuse to come home when humans are going to bed; stay out all night then yowl like i am dying at 4am. Eat the rubberband the cat was chasing the mouse so demand to be let outside at once, and expect owner to wait for me as i think about it yet taco cat backwards spells taco cat furrier and even more furrier hairball for groom forever, stretch tongue and leave it slightly out, blep stand in front of the computer screen. Red light attracts my eyes, light must die, attack! </p> <p id="p3"> <img src="Maddi.jpg" alt="Cute Cat-Maddison" id="img1"> More napping, more napping all the napping is exhausting. Fish i must find my red catnip fishy fish who's the baby pet me pet me don't pet me scratch need to chase tail, but intently stare at the same spot, or i like frogs and 0 gravity. Meow to be let out thinking longingly about tuna brine or catasstrophe scratch, yet stare at wall turn and meow stare at wall some more meow again continue staring take a big fluffing crap cough hairball on conveniently placed pants. Lounge in doorway hiding behind the couch until lured out by a feathery toy. Sit on human give attitude, or meow go back to sleep owner brings food and water tries to pet on head, so scratch get sprayed by water because bad cat or lick butt. Stare at ceiling. </p> </body>

当页面加载不起作用时，Javascript/JQuery 会弹出一个警报

问题描述

1 个解决方案

解决方案1
0 2019-02-25 02:15:52

当页面加载不起作用时，Javascript/JQuery 会弹出一个警报

问题描述

1 个解决方案

解决方案1 0 2019-02-25 02:15:52

解决方案1
0 2019-02-25 02:15:52