回答編集履歴
1
chousei
test
CHANGED
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@@ -139,3 +139,99 @@
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139
139
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he
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140
140
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141
141
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※すでにasnycFuncが処理済みなのでhe likesは表示されない
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142
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+
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143
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144
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145
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# さらに
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146
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147
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148
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149
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```javascript
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150
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151
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const asyncFunc=()=>{
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152
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153
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return new Promise(resolve=>{
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154
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155
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setTimeout(()=>{
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156
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157
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console.log(3);
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158
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159
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resolve("he");
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160
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161
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},1000);
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162
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163
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});
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164
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165
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}
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166
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167
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168
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169
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const wait=async()=>{
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170
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171
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console.log(2.1);
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172
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173
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console.log(2.2);
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174
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175
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await console.log(2.3);
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176
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177
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console.log(2.4);
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178
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179
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console.log(2.5);
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180
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181
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let a = await asyncFunc().then(val=>{
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182
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183
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console.log(val);
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184
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185
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return val + " likes";
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186
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187
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});
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188
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189
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console.log(a);
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190
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191
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console.log(5);
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192
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193
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}
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194
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195
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196
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197
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console.log(1);
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198
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199
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wait();
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200
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201
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console.log(4.1);
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202
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203
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for(var i=0;i<999999999;i++){} //同期処理で重めのループ
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204
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205
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console.log(4.2);
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206
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207
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```
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208
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209
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結果：
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210
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211
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1
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212
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213
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2.1
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214
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215
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2.2
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216
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217
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2.3 //ここでawaitがかかるので処理が移り
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218
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219
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4.1
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220
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221
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(ちょっと考え込んで)
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222
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223
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4.2 //同期処理が続くので終了まで待ち
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224
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225
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2.4 //元の処理にもど
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226
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227
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2.5
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228
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229
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(１秒待って)
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230
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231
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3
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232
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233
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he
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234
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235
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he likes
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236
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237
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5
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