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flex 容器与项目的案例演示
phpcn_u202398
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flex 容器与项目

1、 display属性


代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>flex的display属性</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. display:inline-flex;
  15. }
  16. .item {
  17. width: 150px;
  18. height: 70px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. }
  22. </style>
  23. </head>
  24. <body>
  25. <div class="container">
  26. <div class="item">php</div>
  27. <div class="item">CSS</div>
  28. <div class="item">HTML</div>
  29. <div class="item">javascript</div>
  30. </div>
  31. </body>
  32. </html>

" class="reference-link">

2、 flex-direction属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>容器主轴方向</title>
  7. <style>
  8. /* 容器 */
  9. .container {
  10. width: 400px;
  11. height: 200px;
  12. }
  13. .container {
  14. display: flex;
  15. }
  16. .container {
  17. /*flex-direction: row;*/
  18. flex-direction: row-reverse;
  19. /* flex-direction: column;
  20. flex-direction: column-reverse;*/
  21. }
  22. .item {
  23. width: 150px;
  24. height: 70px;
  25. background-color: cyan;
  26. font-size: 1.5rem;
  27. }
  28. </style>
  29. </head>
  30. <body>
  31. <div class="container">
  32. <div class="item">php</div>
  33. <div class="item">CSS</div>
  34. <div class="item">HTML</div>
  35. <div class="item">javascript</div>
  36. </div>
  37. </body>
  38. </html>

" class="reference-link">

3 flex-wrap属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>容器主轴方向</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .container {
  16. flex-direction: row;
  17. }
  18. .container {
  19. /*flex-wrap: nowrap;
  20. flex-wrap: wrap;*/
  21. flex-wrap: wrap-reverse;
  22. }
  23. .item {
  24. width: 150px;
  25. height: 70px;
  26. background-color: cyan;
  27. font-size: 1.5rem;
  28. }
  29. </style>
  30. </head>
  31. <body>
  32. <div class="container">
  33. <div class="item">php</div>
  34. <div class="item">CSS</div>
  35. <div class="item">HTML</div>
  36. <div class="item">javascript</div>
  37. </div>
  38. </body>
  39. </html>

" class="reference-link">

4、 justify-content属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>主轴项目对齐方式</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .container {
  16. /*justify-content: flex-start;
  17. justify-content: flex-end;
  18. justify-content: center;*/
  19. justify-content: space-between;
  20. /*justify-content: space-around;
  21. justify-content: space-evenly;*/
  22. }
  23. .item {
  24. width: 80px;
  25. height: 50px;
  26. background-color: cyan;
  27. font-size: 1.5rem;
  28. }
  29. </style>
  30. </head>
  31. <body>
  32. <div class="container">
  33. <div class="item">php</div>
  34. <div class="item">CSS</div>
  35. <div class="item">HTML</div>
  36. <div class="item">javascript</div>
  37. </div>
  38. </body>
  39. </html>

" class="reference-link">

5、 align-items属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>交叉轴项目对齐方式</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .container {
  16. /* align-items: flex-start;
  17. align-items: flex-end;*/
  18. align-items: center;
  19. }
  20. .item {
  21. width: 80px;
  22. height: 50px;
  23. background-color: cyan;
  24. font-size: 1.5rem;
  25. }
  26. </style>
  27. </head>
  28. <body>
  29. <div class="container">
  30. <div class="item">php</div>
  31. <div class="item">CSS</div>
  32. <div class="item">HTML</div>
  33. <div class="item">javascript</div>
  34. </div>
  35. </body>
  36. </html>

" class="reference-link">

6、 align-content属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>交叉轴项目对齐方式</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .container {
  16. flex-flow: row wrap;
  17. /*align-content: stretch;
  18. align-content: flex-start;
  19. align-content: flex-end;
  20. align-content: center;
  21. align-content: space-between;
  22. align-content: space-around;*/
  23. align-content: space-evenly;
  24. }
  25. .item {
  26. width: 80px;
  27. height: 50px;
  28. background-color: cyan;
  29. font-size: 1.5rem;
  30. }
  31. </style>
  32. </head>
  33. <body>
  34. <div class="container">
  35. <div class="item">php</div>
  36. <div class="item">CSS</div>
  37. <div class="item">HTML</div>
  38. <div class="item">javascript</div>
  39. <div class="item">C</div>
  40. <div class="item">C#</div>
  41. <div class="item">C++</div>
  42. <div class="item">java</div>
  43. </div>
  44. </body>
  45. </html>

" class="reference-link">

7、 align-self属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目独立对齐方向</title>
  7. <style>
  8. .container {
  9. width: 300px;
  10. height: 150px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .item {
  16. width: 50px;
  17. height: 50px;
  18. background-color: cyan;
  19. font-size: 1.5rem;
  20. align-self: auto;
  21. }
  22. .item:first-of-type {
  23. align-self: stretch;
  24. background-color: lightgreen;
  25. }
  26. .item:nth-of-type(2) {
  27. background-color: lightcoral;
  28. align-self: flex-start;
  29. }
  30. .item:nth-of-type(3) {
  31. background-color: wheat;
  32. align-self: flex-end;
  33. }
  34. .item:last-of-type {
  35. align-self: center;
  36. }
  37. </style>
  38. </head>
  39. <body>
  40. <div class="container">
  41. <div class="item">php</div>
  42. <div class="item">CSS</div>
  43. <div class="item">HTML</div>
  44. <div class="item">javascript</div>
  45. </div>
  46. </body>
  47. </html>

" class="reference-link">

8、 flex-grow属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目放大因子</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. }
  15. .item {
  16. width: 80px;
  17. height: 50px;
  18. background-color: cyan;
  19. font-size: 1.5rem;
  20. flex-grow: initial;
  21. flex-grow: 0;
  22. }
  23. .item:first-of-type {
  24. background-color: lightgreen;
  25. flex-grow: 1;
  26. }
  27. .item:nth-of-type(2) {
  28. background-color: lightcoral;
  29. flex-grow: 2;
  30. }
  31. .item:last-of-type {
  32. background-color: wheat;
  33. flex-grow: 3;
  34. }
  35. </style>
  36. </head>
  37. <body>
  38. <div class="container">
  39. <div class="item">php</div>
  40. <div class="item">CSS</div>
  41. <div class="item">HTML</div>
  42. </div>
  43. </body>
  44. </html>

" class="reference-link">

9、 flex-shrink属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目收缩因子</title>
  7. <style>
  8. .container {
  9. width: 300px;
  10. height: 150px;
  11. }
  12. .container {
  13. display: flex;
  14. flex-flow: row nowrap;
  15. }
  16. .item {
  17. width: 150px;
  18. height: 50px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. flex-shrink: 0;
  22. }
  23. .item:first-of-type {
  24. background-color: lightgreen;
  25. flex-shrink: 1;
  26. }
  27. .item:nth-of-type(2) {
  28. background-color: lightcoral;
  29. flex-shrink: 2;
  30. }
  31. .item:last-of-type {
  32. background-color: wheat;
  33. flex-shrink: 3;
  34. }
  35. </style>
  36. </head>
  37. <body>
  38. <div class="container">
  39. <div class="item">php</div>
  40. <div class="item">CSS</div>
  41. <div class="item">HTML</div>
  42. </div>
  43. </body>
  44. </html>

" class="reference-link">

10、 flex-basis属性

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目在主轴上的计算宽度</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. flex-flow: row wrap;
  15. }
  16. .item {
  17. width: 80px;
  18. height: 50px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. }
  22. .item {
  23. flex-basis: auto;
  24. flex-basis: 70px;
  25. flex-basis: 20%;
  26. flex-basis: 5rem;
  27. max-width: 100px;
  28. flex-basis: 150px;
  29. }
  30. </style>
  31. </head>
  32. <body>
  33. <div class="container">
  34. <div class="item">php</div>
  35. <div class="item">CSS</div>
  36. <div class="item">HTML</div>
  37. </div>
  38. </body>
  39. </html>

11、flex属性 三值语法

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目在主轴上的计算宽度</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. flex-flow: row wrap;
  15. }
  16. .item {
  17. width: 80px;
  18. height: 50px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. }
  22. .item {
  23. /*flex:0 1 auto;
  24. flex:1 1 auto;*/
  25. flex: 0 0 auto;
  26. }
  27. </style>
  28. </head>
  29. <body>
  30. <div class="container">
  31. <div class="item">php</div>
  32. <div class="item">CSS</div>
  33. <div class="item">HTML</div>
  34. </div>
  35. </body>
  36. </html>

" class="reference-link">

12、 双值语法

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目在主轴上的计算宽度</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. flex-flow: row wrap;
  15. }
  16. .item {
  17. width: 80px;
  18. height: 50px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. }
  22. .item {
  23. flex: 0 200px;
  24. }
  25. </style>
  26. </head>
  27. <body>
  28. <div class="container">
  29. <div class="item">php</div>
  30. <div class="item">CSS</div>
  31. <div class="item">HTML</div>
  32. </div>
  33. </body>
  34. </html>

" class="reference-link">

13、 单值语法

代码实例
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" />
  5. <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6. <title>项目在主轴上的计算宽度</title>
  7. <style>
  8. .container {
  9. width: 400px;
  10. height: 200px;
  11. }
  12. .container {
  13. display: flex;
  14. flex-flow: row wrap;
  15. }
  16. .item {
  17. width: 80px;
  18. height: 50px;
  19. background-color: cyan;
  20. font-size: 1.5rem;
  21. }
  22. .item {
  23. flex:1;
  24. }
  25. </style>
  26. </head>
  27. <body>
  28. <div class="container">
  29. <div class="item">php</div>
  30. <div class="item">CSS</div>
  31. <div class="item">HTML</div>
  32. </div>
  33. </body>
  34. </html>

flex容器与项目学习总结

本节课我们学习了flex的属性,通过本节课的学习与之前学到的float相比,flex的布局代码简洁,使用灵活,能够快速的进行页面布局,使我学到了新的前端布局方法,同时增加了我的学习兴趣。

Correcting teacher:天蓬老师天蓬老师

Correction status:qualified

Teacher's comments:布局技术, 每隔几年都会有新的出现, 咱们是学习者, 要保持对新技术的好奇心
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