回答編集履歴
1
調整
test
CHANGED
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@@ -11,3 +11,69 @@
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11
11
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</div>
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12
12
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13
13
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```
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14
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+
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15
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16
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17
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+
# 参考
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18
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19
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```javacscript
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20
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21
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<script>
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22
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23
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window.addEventListener('DOMContentLoaded', ()=>{
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24
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25
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document.querySelector('#up').addEventListener('change',e=>{
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26
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27
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var target=e.target;
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28
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29
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var file=target.files[0];
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30
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31
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if(file !==undefined){
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32
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33
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var fr = new FileReader();
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34
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35
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fr.addEventListener('load',e=>{
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36
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37
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var type=file.type;
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38
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39
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if(["image/jpeg","image/gif","image/png"].indexOf(type)>-1){
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40
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var blob=new Blob([e.target.result],{type});
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42
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43
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var binary=String.fromCharCode.apply("",new Uint8Array(e.target.result));
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44
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45
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var base64="data:"+file.type+";base64,"+btoa(binary);
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46
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47
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var img=Object.assign(document.createElement('img'),{src:base64});
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48
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49
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Object.assign(document.querySelector('#img'),{textContent:""}).appendChild(img);
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50
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51
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}else{
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52
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53
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target.value="";
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54
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55
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document.querySelector('#img').textContent="";
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56
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57
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}
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58
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59
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});
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60
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61
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fr.readAsArrayBuffer(file);
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62
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63
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}
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64
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65
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});
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66
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67
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});
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68
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69
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</script>
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70
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71
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<input type="file" value="up" id="up" accept="image/*">
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72
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73
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<div id="img">
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74
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75
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<!--ここに画像をいれる-->
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76
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77
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</div>
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78
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79
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```
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