質問編集履歴
3
存在しない数字を入れた場合のchrome developer tools上のエラー
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File without changes
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body
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@@ -57,8 +57,29 @@
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57
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Symbol(Symbol.unscopables): {copyWithin: true, entries: true, fill: true, find: true, findIndex: true, …}
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__proto__: Object
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```
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60
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存在しない数字を入れた場合のchrome developer tools上のエラー
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61
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```
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62
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+
Uncaught TypeError: Cannot read property 'summary' of null
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63
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at buildHtml (books.self-cf274625d10f3ce57f6688d7617e8fe8605e8ef10ac2ff3e48f64e8444310545.js?body=1:3)
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64
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at Object.<anonymous> (books.self-cf274625d10f3ce57f6688d7617e8fe8605e8ef10ac2ff3e48f64e8444310545.js?body=1:19)
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65
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at fire (jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:3269)
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66
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at Object.fireWith [as resolveWith] (jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:3399)
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67
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at done (jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9306)
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68
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at XMLHttpRequest.<anonymous> (jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9549)
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69
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+
buildHtml @ books.self-cf274625d10f3ce57f6688d7617e8fe8605e8ef10ac2ff3e48f64e8444310545.js?body=1:3
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70
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(anonymous) @ books.self-cf274625d10f3ce57f6688d7617e8fe8605e8ef10ac2ff3e48f64e8444310545.js?body=1:19
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71
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fire @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:3269
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72
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fireWith @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:3399
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73
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done @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9306
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74
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(anonymous) @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9549
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75
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+
load (async)
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76
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send @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9568
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77
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ajax @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:9207
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78
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(anonymous) @ books.self-cf274625d10f3ce57f6688d7617e8fe8605e8ef10ac2ff3e48f64e8444310545.js?body=1:12
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79
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dispatch @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:5184
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80
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elemData.handle @ jquery3.self-5af507e253c37e9c9dcf65064fc3f93795e6e28012780579975a4d709f4074ad.js?body=1:4992
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81
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```
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61
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-
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### 該当のソースコード
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84
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64
85
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```book
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2
エラーメッセージの追加
title
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File without changes
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body
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@@ -5,6 +5,60 @@
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5
5
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### 発生している問題・エラーメッセージ
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6
6
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ソースコードのように記述していますが、nullを判定できず、条件分岐してくれません。
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7
7
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8
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https://api.openbd.jp/v1/get?isbn=1241の様に適当な数字を入れ実行したところ、
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9
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ブラウザ上には[null]と表示されました。
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10
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+
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11
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chromeでの検証結果
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12
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```
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13
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[null]
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14
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0: null
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15
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length: 1
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16
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__proto__: Array(0)
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17
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concat: ƒ concat()
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constructor: ƒ Array()
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copyWithin: ƒ copyWithin()
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entries: ƒ entries()
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every: ƒ every()
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fill: ƒ fill()
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filter: ƒ filter()
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find: ƒ find()
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findIndex: ƒ findIndex()
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flat: ƒ flat()
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flatMap: ƒ flatMap()
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forEach: ƒ forEach()
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includes: ƒ includes()
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indexOf: ƒ indexOf()
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join: ƒ join()
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keys: ƒ keys()
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33
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lastIndexOf: ƒ lastIndexOf()
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length: 0
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35
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map: ƒ map()
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36
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pop: ƒ pop()
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push: ƒ push()
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reduce: ƒ reduce()
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reduceRight: ƒ reduceRight()
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40
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arguments: (...)
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41
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caller: (...)
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length: 1
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name: "reduceRight"
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__proto__: ƒ ()
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[[Scopes]]: Scopes[0]
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46
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reverse: ƒ reverse()
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47
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shift: ƒ shift()
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48
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slice: ƒ slice()
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49
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some: ƒ some()
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50
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sort: ƒ sort()
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51
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splice: ƒ splice()
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toLocaleString: ƒ toLocaleString()
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toString: ƒ toString()
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unshift: ƒ unshift()
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values: ƒ values()
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+
Symbol(Symbol.iterator): ƒ values()
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57
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+
Symbol(Symbol.unscopables): {copyWithin: true, entries: true, fill: true, find: true, findIndex: true, …}
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58
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+
__proto__: Object
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59
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+
```
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60
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+
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61
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+
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8
62
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### 該当のソースコード
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9
63
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10
64
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```book
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1
やってみたことの編集
title
CHANGED
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File without changes
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body
CHANGED
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@@ -48,4 +48,4 @@
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48
48
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49
49
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### 試したこと
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50
50
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51
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-
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51
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+
elseif文を追加し「data[0].summary.title == null」などにしても条件分岐してくれませんでした。
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